Publications
BOOKS AND MONOGRAPHS
- PHYSICS AND CHEMISTRY OF RARE-EARTH IONS DOPED GLASSES (Eds N.Sooraj Hussain and Jose Domingos Da Silva Santos) Chapter 2:"ANALYSIS OF THE LASER TRANSITION AND NON-RADIATIVE PROPERITES OF Nd3 IN NOVEL FLUOROPHOSPHATE GLASSES" Publisher:"Trans Tech Publications Inc." (Publishers in Science and Engineering), Material Science Foundations (Monograph Series), Volumes 46-47 2008
- LIGANDS AND MODIFIERS IN VITREOUS MATERIALS : SPECTROSCOPY OF CONDENSED SYSTEMS Publisher: "World Scientific" Inc. Press, Singapore, New Jersey, London, Hong Kong, 1999
- GERMANATE GLASSES: STRUCTURE, SPECTROSCOPY AND PROPERTIES Publisher: "Artech House" Inc. Press, Boston- London, 1993
- PHOTODETECTORS AND FIBER OPTICS (Ed. H.S.Nalwa) Chapter: "GERMANIUM DIOXIDE BASED GLASSES AS ADVANCED OPTICAL SENSORS MATERIALS" Publisher: "Academic Press" San Diego- Boston, 2001
- SPECTROSCOPY OF DOPED FLUOROBERYLLATE GLASSES Publisher: "Hayastan" Press, Yerevan 1974 (in Russian)
- GERMANATE GLASSES Publisher: "Hayastan" Press,Yerevan, 1988 (In Russian)
- MATERIALS OF THE CONFER. YOUNG SCIENTISTS INSTITUTE OF GENERAL AND INORGANIC CHEMISTRY ACADEMY OF SCIENCE ARMENIA (Editor Alfred Margaryan) Publisher: "Academy of Sci." Press, Yerevan, 1973. (in Russian)
TEXT BOOKS
- OPTICAL MATERIALS Optical Engineering Series, Prof.W.Liu Series Editor Publisher: Control Optics Corporation, La Verne, CA , 1991
- THIN FILM IN OPTICS Optical Engineering Series, Prof.W.Liu Series Editor Publisher: Control Optics Corporation, La Verne, CA, 1992
PATENTS
- FLUOROPHOSPHATE GLASS AND METHOD FOR MAKING THEREOF Patent USA Serial Number 10/054328 01.21.02
- GLASSES FOR LASER AND FIBER AMPLIFIER APPLICATIONS AND METHOD FOR MAKING THEREOF Patent USA # 6495481 2002
- OPTICAL GLASS Patent USSR # 1278315 1986
- THE LIGHT- MELT GLASSES Patent USSR # 1011575 1983
- SPECIAL Patent USSR # 186302 1983
- RARE- EARTH ELEMENT MANGANATES FOR INDUSTRY OF THE LUMINESCENCED GLASSES Patent USSR # 807596 1981
- LASER GLASS Patent USSR # 792808 1980
- POLISHING SUBSTANCES FOR OPTICAL ELEMENTS Patent USSR # 553831 1977
- METHOD PREPARATION OF mNd2O3.nMnO Patent USSR # 582649 1977
ARTICLES
- J.H.Choi , Alfred Margaryan, Ashot Margaryan, F.G. Shi " "Dependence of Thermo-Mechanical and Mechanical Properties of Novel Fluorophosphate Glass on Various Rare-Earth Dopants", J. Maerials Science, Vol. 43, pp.1109-1113 (2008)
- Ju H.Choi , Frank G. Shi, Alfred Margaryan, Ashot Margaryan, Wytze Van der Veer " "Novel Alkaline-Free Er 3 Doped Fluorophosphate Glasses for Broadband Optical Fiber Lasers and Amplifiers:, j. Alloys and Compounds, Vol. 450, pp. 540-545 (2008)
- Ju H.Choi , Alfred Margaryan, Ashot Margaryan, Frank G. Shi, Wytze Van der Veer "Fluorescence and Non-Radiative Properties of Nd 3 in Novel Heavy Metal Contained Fluorophosphate Glass", Advances in OptoElectronics, Vol. 2007 (2007), Article ID 39892, 8 pages, doi:10.1155/2007/39892
- Ju H.Choi , Alfred Margaryan, Ashot Margaryan, Wytze Van der Veer,Frank G. Shi "Rare Earth Doped Photonic Glass Materials for the Miniaturization and Integration of Optoelectronic Devices", 39th International Symposium on Microelectronics, October 8-12, 2006, San Diego, California, U.S.A
- J.H.Choi , Alfred Margaryan, Ashot Margaryan, F.G. Shi " Spectoscopic properties of Yb3+ in heavy metal contained fluorophosphate glasses", Materials Research Bulletin, Vol. 40, Issue 12, pp. 2189-2197 (2005)
- J.H.Choi , Alfred Margaryan, Ashot Margaryan, F.G. Shi " Optical transition properties of Yb3+ in new fluorophosphate glasses with high gain coefficient", Journal of Alloys and Compounds, Vol. 396, Issues 1-2, pp. 79-85 (2005)
- J.H.Choi , Alfred Margaryan, Ashot Margaryan, F.G. Shi " Judd-Ofelt analysis of spectroscopic properties of Nd3+ - doped novel fluorophosphate glass", Journal of Luminescence, Vol. 114, Issues 3-4, pp.167-177 (2005)
- J.H.Choi , F.G. Shi, Alfred Margaryan, Ashot Margaryan " Refractive index and low dispersion properties of new fluorophosphate glasses highly doped with rare-earth ions" Journal of Materials Research Vol. 20, Number 1, pp. 264-270 (2005)
- Alfred Margaryan, Ashot Margaryan, Ju.H.Choi ,Frank Shi " Spectroscopic Properties of Mn2+ in new Bismuth and Lead contained Fluorophosphate Glasses", Applied Physics B78, 409-413 (2004) (Lasers and Optics)
- Ju.H.Choi ,Frank Shi and Alfred Margaryan:'' Novel Broadband and Eye- safe Laser Source Materials: Alkaline-free Yb3+ doped Fluorophosphate Glasses for Fiber and Waveguide Lasers'', The International Symposium On Photonic Glasses, October 14- 17, 2002 Shanghai, China
- Ju.H.Choi, Frank Shi and Alfred Margaryan:" Yb3+ doped Fluorophosphate Glasses for Fiber and Waveguide Lasers", The International Symposium On Photonic Glasses, October 14- 17, 2002 Shanghai, China
- Ju.H.Choi, Frank G.Shi, Alfred A.Margaryan and Ashot A. Margaryan:"Dopant type and concentration dependence of linear and nonlinear refractive index and dispersion for a new (Mg, Ba)F2- based fluorophosphates glass", Proceedings of SPIE, Vol.4970, 2003 [ Laser Crystals, Glasses, and Nonlinear Materials Growth and Characterization ]
- Ju.H.Choi, Frank G.Shi, Alfred A. Margaryan , Ashot A. Margaryan and W.E.van der Veer:" Optical properties of Nd3+ doped fluorophosphates glass for broadband fiber amplifier applications" , Proceedings of SPIE , Vol. 4974, 2003 [ Advances in Fiber Devices ]
- Ju.H.Choi, Frank G.Shi, Alfred A.Margaryan and Ashot A. Margaryan:" Spectral parameters of Nd3+ ion in new fluorophosphates glasses: Judd- Ofelt parameters", Proceedings of SPIE, Vol. 4974, 2003 [ Advances in Fiber Devices ]
- Effect of modifier and ligand ions on the Spectroscopic properties of Mn(II) in Phosphor-containing vitreous materials J. Non-Cryst. Solids, Vol. 122, 1990,pp. 74- 78
- An electron spin resonance investigation of vitreous and crystalline modifications of Germanium Dioxide J. Materials Sc. Letters, Vol. 10, 1991,pp.1425- 27
- Flourine-containing Germanate glasses J. Materials Sci. Letters, Vol. 11, 1992, pp. 1511- 13
- Prospect of using Germanium Dioxide based glasses for optics J. Optical Engin.,Vol. 32, 1993, pp. 1995- 1996
- An Infrared Spectroscopic Investigation of glasses in the system K2O- P2O5- GeO2 J. Materials Sci. Letters, Vol. 12, 1993, pp. 230- 31
- Vitreous modification of the Germanium Dioxide in optics World Optics Conf. "WOC-93", Shanghai, China, Aug. 30- Sept. 3, 1993
- Investigation of "Yerevanit", Material for Glass Melting News Acad. Sci. Arm.SSR, # 3, 1963,pp. 291- 95
- Light Transmission of the Beryllium Fluorine Glasses with the NdF3 in the UV- range of Spectra News Acad. Sci. Arm.SSR, # 5, 1965, pp. 437- 40
- UV- Light Transmission of the Beryllium Fluorine Glasses with small amounts Fluorides of Rare- Earth Metals Arm. Chem. J. # 3, 1966, pp. 167-70
- IR- Spectra of the Beryllium Fluorine Glasses with small amounts Fluorides of Rare- Earth Metals Arm. Chem. J. # 5, 1966, pp. 325-29
- Hydrolytic Strength of the Beryllium Fluorine Glasses with Fluorides of Rare- Earth Metals Arm. Chem. J. # 4, 1967, pp. 270-74
- Questions of the Chemical Strength of Beryllium Fluorine Glasses News Acad. Sci. USSR, Inorganic Mater., # 1, 1968, pp. 116- 20
- Influence of the - OH Groups on the Radiation Strength of Beryllium Fluorine Glasses Arm. Chem. J. # 6, 1968, pp. 459- 61
- Spectroscopic Investigation of the Beryllium Fluorine Glasses Doped Mn(II) The Spectrosc. of Solid State, 1969, pp. 221- 25, Nauka Press, Leningrad, USSR
- Gamma- Strength of the Beryllium Fluorine Glasses Doped Fluorides of Rare- Earth Metals J. Glass, # 2, 1968, 120- 25
- The UV- Transmission of the Beryllium Fluorine Glasses Report Sci. Conf. of the Leningrad Chemico-Technol. Institute, 1966, pp. 234- 35
- Several Properties of the Glasses Synthesized on the base Beryllium Fluorine The Glassformer Systems and New Glasses. Moscow, 1971, pp. 300- 303
- Radiation Strength of the Beryllium Fluorine Glasses Doped Rare- Earth Elements Arm. Chem. J. # 5, 1970, pp. 404-409
- Absorption Spectra of the Beryllium Fluorine Glasses on the Large Region Spectra Doped Fluorides of Rare- Earth Metals Arm. Chem. J. # 8, 1969, pp. 651-657
- The New Luminescenced Glasses for the Optical Generators Indus. Armenia, # 2, 1969, pp. 32-34
- Spectroscopic Properties of the New Glasses Doped Mn(II) Indus. Armenia, # 9, 1969, pp. 8- 10
- Influence of Chemical Bonds on the Properties of Doped Glasses Arm. Chem. J. # 9, 1970, pp. 790-796
- Spectra of Absorption, Luminescence and ESR of the Beryllium Fluorine Glasses Doped Mn(II) Arm. Chem. J. # 11, 1969, pp. 969-75
- Speciality and Perspectivity of the Laser Glasses Indus. Armenia, # 8, 1970, pp. 19-21
- Glassformation in the SiO2- Nd2O3 System Indus. Armenia, # 6, 1971, pp. 27-29
- Several Properties of Glasses on the Base Beryllium Fluorine Chem. Inorganic Fluorides. Moscow, 1970, pp. 189- 190
- Glassformation in the SiO2- Nd2O3 and SiO2-La2O3-R2O Systems Arm. Chem. J. # 11, 1971, pp. 1022-1024
- Glassformation in the P2O5-LaF3-RF2 (R-Ba, Mg) Systems News Acad. Sci.USSR, Inorganic Materials, # 5, 1972, pp. 972- 973
- Spectra ESR of the Mn(II) in Fluorophosphate Glasses Arm. Chem. J.# 11, 1972, pp. 978- 980
- ESR of Mn(II) in the Melted SiO2 Arm. Chem. J. # 10, 1972, pp. 890- 891
- ESR of Mn(II) in the Simple Alkaline Germanate Glasses Arm. Chem. J. # 7, 1972, pp. 620-622
- Chemical Bonds and Spectroscopy of Doped Inorganic Glasses Conf. Young Sci. of Institute General and Inorganic Chemistry Acad. Sci., Yerevan, 1973, pp. 171- 177
- Investigation by ESR Method of the Glassy and Crystalline SiO2 and GeO2 Doped Mn(II) Proceedings Acad. Sci. USSR, # 5, 1973, pp. 1121- 1123
- ESR of Mn(II) in the Melted and Crystalline SiO2 Report Sci. Conf. Baku, 1973, pp. 15-16
- Study of the Structure of Alkaline Germanate and Fluorophosphate Melts by ESR Methods Conf. Young Sci. Inst. General and Inorgan. Chem. Akad.Science, Yerevan, 1973 pp.159-165
- ESR of Mn(II) in the Glassy and Crystalline SiO2 Conf. Young Sci. Inst. General and Inorgan. Chem. Akad.Science, Yerevan, 1973 pp.153-158
- Glassformation in the SiO2- Nd2O3 System Conf. Young Sci. Inst. General and Inorgan. Chem. Akad. Science, Yerevan, 1973 pp.142-147
- Synthesis of the Photochromic Glasses on the Base Synthetic Silicates Conf. Young Sci. Inst. General and Inorgan. Chem. Akad. Science, Yerevan, 1973 pp.148-152
- Investigation of the P2O5- LaF3- RF2 Systems Conf. Young Sci. Inst. General and Inorgan. Chem. Akad. Science, Yerevan, 1973 pp.166-170
- Vaporization of the Cl from SiO2- Na2O Melt Armen. Chem.J.,#7. 1974,pp.553-556
- Investigation of the Structure of Fluorophosphate Glasses in the P2O5- LaF3- RF2 Systems by IR Method Armen.Chem.J., #11,1974, pp 929- 933
- ESR Investigation of the Glassy and Crystalline SiO2 and GeO2 Report II Conf. Inorgan. Chem., Yerevan, 1973, pp 10
- Chemical Bonds in the Doped Inorganic Glasses Report II Conf. Inorgan. Chem., Yerevan, 1973, pp 13
- Investigation by ESR Method of the Structure Glassy and Crystalline GeO2 Doped Mn (II) News Acad. Sci. USSR, Inorgan. Mater.,#8, 1976 pp.1411-1414
- Study by ESR Method of the Structure Isotopic and Anisotropic Modification of GeO2 Proceedings Acad. Science USSR,#1, 1974, pp. 145-147
- The Spectroscopy of Mn(II) in the Fluorophosphate Glasses Proceedings Acad. Science USSR, # 3, 1975, pp. 665- 970
- The Glassformation in the GeO2-Na2O-RxOy Systems Armen. Chem. J,. # 11, 1976, pp. 970-971
- Spectroscopy of the Mn(II) and Nature of Chemical Bonds In the Several Glasses Report IV Conf. Inorgan. Chem., Yerevan, 1976, pp. 66- 71
- The Peculiarities on the Structure of Isotropic and Anisotropic Modification of GeO2 Report III Conf. Inorgan. Chem., Yerevan, 1975, pp. 31- 32
- Glassformation in the GeO2-Na2O-RxOy Systems Report III Conf. Inorgan. Chem., Yerevan, 1975, pp. 45
- Investigation of Nd(NO3)3-NaAIO2-H2O System at the 20oC Temperature Report III Conf. Inorgan. Chem., Yerevan, 1975, pp. 52
- The Absorption and Luminescence of Mn(II) in the Fluorophosphate Glasses Report III Conf. Inorgan. Chem., Yerevan, 1975, pp. 17- 18
- Study of the Structure of Fluorophosphate Glasses by ESR Method Report III Conf. Inorgan. Chem., Yerevan, 1975, pp. 44
- Vaporization of the Cl from SiO2- Na2O Melts Report III Conf. Inorgan. Chem., Yerevan, 1975, pp. 19
- Investigation of the Structure Na2O-P2O5-GeO2 System Glasses by IR Spectroscopic Method Proceedings Acad. Science USSR , # 6, 1976, pp. 1368-1370
- The Influence of Modifier and Ligand Fields on the Luminescence of Mn(II) in Inorganic Glasses Proceedings Acad. Science USSR , # 4, 1976, pp. 881-883
- The Influence of Modifier Ions on the Spectroscopic Properties of Mn(II) in the Glasses Report IV Conf. Inorgan. Chem., Yerevan, 1976, pp. 21- 23
- The Influence of Modifier and Ligand Fields on the Spectroscopy of Mn(II) in Inorganic Glasses Report IV Conf. Inorgan. Chem., Yerevan, 1976, pp. 6- 8
- Glassformation in the Ba(PO3)2-LaF3(YF3)- RF2 Systems and Investigation of Glass Structure by IR Spectroscopic Method Report IV Conf. Inorgan. Chem., Yerevan, 1976, pp. 24- 25
- Glassformation and Structure of Tiophosphate Glasses Report IV Conf. Inorgan. Chem., Yerevan, 1976, pp. 57- 59
- Synthesis and Glassformation in the RGe4O9- Ba(PO3)2- - RF2 Systems Report IV Conf. Inorgan. Chem., Yerevan, 1976, pp. 156- 159
- Glassformation in the Al(PO3)3- LaF3- RF2 System and Investigation of Glass Structure by IR Spectroscopic Method Report IV Conf. Inorgan. Chem., Yerevan, 1976, pp. 59- 60
- Investigation of Structure Na2O- P2O5- GeO2 Glasses by IR Spectroscopic Method Report IV Conf. Inorgan. Chem., Yerevan, 1976, pp. 150- 153
- The Influence of Ions on the Absorption Spectra and ESR of Mn(II) in the Phosphorcontaining Glasses Proceedings Acad. Science USSR, # 1, 1977, pp. 131- 133
- The Influence of Modifier and Ligand Fields on the Luminescence of Mn(II) in Inorganic Glasses XI th International Congress on Glass Pragu, Vol. 3, 1977, pp. 79- 85
- Der Einfluss Von Netzwerkwandlen und Ligandenfelder Auf die Lumineszenz Von Mn(II) in Anorganischen Glasen XI th Intern. Glaskongres, Prag, 1977, pp. 150
- The Influence of Modifier and Ligand Fields on the Absorption And ESR Spectra of Mn(II) in the Phosphorcontaining Glasses Report V Conf. Inorgan. Chem., Yerevan, 1977, pp. 41- 45
- Tiophosphate Glasses in the Ba(PO3)2-Na2S-RF2 Systems Report V Conf. Inorgan. Chem., Yerevan, 1977, pp. 9- 11
- Investigation Structure of Fluorophosphate Glasses Ba(PO3)2- Al(PO3)3- RF2 by IR Method Report V Conf. Iorgan. Chem., Yerevan, 1977, pp. 22- 24
- Glassformation in the GeO2- Na2O- RxOy (R- La, Y, Ga, Nb, Sn ) Systems Report V Conf. Inorgan. Chem., Yerevan, 1977, pp. 70-71
- Synthesis of Glasses in the Germanium-Fluorophosphate Systems Report V Conf. Inorgan. Chem., Yerevan, 1977, pp. 54- 55
- Role of Ligands and Modifiers in the Glassform Materials Report V Conf. Inorgan. Chem., Yerevan, 1977, pp. 7- 8
- Ligands and Modifiers in Inorganic Glasses Report VI Conf. Inorgan. Chem., Yerevan, 1978, pp. 72
- Investigation Structure of Glasses in the Na2O- SiO2-GeO2 System by IR Spectroscopic Method Report VI Conf. Inorgan. Chem., Yerevan, 1978, pp. 93- 95
- The Influence of Ligands on the Glassformation Report VI Conf. Inorgan. Chem., Yerevan, 1978, pp. 135- 136
- Possibility Obtaining Specially Clean Glasses in the Vertical Sunny Furnaces Report Conf. On Fiber Optics, Moscow, 1978, pp. 27- 28
- Distribution of Micro- Elements in Glass Melt in the Radiation Furnaces Ind. Armenia, # 9, 1979, pp. 40- 42
- The Physical- Chemistry Investigation of Ba(PO3)2- Na2S- -RF2 System Glasses Armen. Chem. J., # 7, 1980, pp. 540-544
- Role of Ligands and Modifiers on the Spectra Luminescence, Absorption and ESR of Mn(II) in Inorganic Glasses Armen. Chem. J., # 9, 1980, pp. 707-714
- The Change of Several Spectroscopic Parameters of Mn(II) in The Crystalline and Glassy Aggregations Report VII Conf. Inorgan. Chem., Yerevan, 1982, pp. 126- 129
- Investigation of CaGe4O9-Ba(PO3)2- RF2 (RO) System Glasses Report VII Conf. Inorgan. Chem., Yerevan, 1982, pp. 109- 115
- Investigation of SrGe4O9-Ba(PO3)2-RF2 (RO) System Glasses Report VII Conf. Inorgan. Chem., Yerevan, 1982, pp. 119- 126
- The Particularities of Glass Melting in the Sunny Furnaces Report VII Conf. Inorgan. Chem., Yerevan, 1982, pp. 166- 170
- The Change of the form of Spectra ESR of Mn(II) in the GeO2- PbO Glasses Report VII Conf. Inorgan. Chem., Yerevan, 1982, pp. 145- 148
- Investigation of Ba(PO3)2-Na2S(Na2O)-MgF2 system Glasses Report VII Conf. Inorgan. Chem., Yerevan, 1982, pp. 116- 118
- Synthesis of the PbSiO3 Report VII Conf. Inorgan. Chem., Yerevan,1982, pp. 3- 8
- The Light Absorption by Glass Melt in the Sunny Furnaces Report VII Conf. Inorgan. Chem., Yerevan, 1982, pp. 155- 159
- Spectroscopic Investigation of BaGe4O9-Ba(PO3)2-BaF2 System Glasses Report VII Conf. Inorgan. Chem., Yerevan, 1982, pp. 149- 154
- The Influence of Modifiers of the Zincum Groups and Ligands On the Spectroscopic Properties Phosphorcontaining Glasses Report VII Conf. Inorgan. Chem., Yerevan, 1982, pp. 130- 136
- Spectroscopic Investigation of Ba(PO3)2-LaF3(YF3)- RF2 Glasses Doped Mn(II) Report II Conf. on Chem. and Technolg. Earth Elements,Yerevan, 1981, pp. 84
- Glassformation and Structure of Ba(PO3)2-LaF3(YF3)- RF2 (R- Mg, Ca, Sr, Ba) System Glasses Report II Conf. on Chem. and Technolg. Earth Elements,Yerevan, 1981, pp. 87
- Glassformation and Structure of Germanium- Phosphate Glasses Containing Fluorides Report II Conf. on Chem. and Technolg. Earth Elements,Yerevan, 1981, pp. 82
- Change of the Form ESR Spectra Mn(II) in GeO2- RxOy Glasses Report II Conf. on Chem. and Technolg. Earth Elements,Yerevan, 1981, pp. 79
- Investigation of Nd(NO3)3-NaAlO2-H2O System at the 20oC Temperature Report II Conf. on Chem. and Technolg. Earth Elements,Yervan, 1981, pp. 9
- The Project of the Vavilov State Optical Institute 1F18-01-77,1978, Leningrad,USSR
- The Project of the Vavilov State Optical Institute 1F18-03-79,1981, Leningrad,USSR
- The Project of the Vavilov State Optical Institute 1F18-03-81,1982, Leningrad, USSR
- Structure of Phosphorcontaining Germanium Fluorine Glassforming Melts Report VI Conf. on Phosphats, "Phosphates-84", Alma Ata, 1984, pp. 126
- The Change of the Chemical Bonds in Glasses of the Ba(PO3)2- Al(PO3)3- BaF2 System Report Conf. "The Structure , Properties and Application of Phosphate, Fluoride and Khalcogen Glasses", Riga, 1985, pp. 91-92
- The Structure of the Fluorine Containing Germanium Phosphate Glasses Report Conf. " The Structure, Properties and Application of Phosphate, Fluoride and Khalcogen Glasses", Riga, 1985, pp. 115-116
- The Fluorine Containing Glasses on the Basic Germanium Dioxide J. Phys. and Chem. of Glass(USSR), # 4, 1986,pp. 477-480
- Absorption Spectra of Beryllium Fluorine Glasses Containing Rare Earth Fluorides J.Phys. Chem. Glasses, # 1, 1970, pp. 9A
- The Structure and IR Investigation of CaGe4O9 - Ba(PO3)2- RF2 System Glasses Report Conf. " Phys. Chem. Analyse Inorgan. Materials", Yerevan, 1986, pp. 46- 47
- The Structure of Fluorine Containing Germanium Phosphate Glasses Report VIII Conf. on Chemistry Inorgan. Fluorides, Moscow, 1987, pp. 247
- Spectroscopy of the Ba(PO3)2- Al(PO3)3- BaF2 System Glasses Report VII Conf. on Phosphates, "Phosphates- 87", Tashkent, 1987
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