Ashraf Fahim Ali creator preparation. A.A. Manna thesis advisor. A. Fahmy thesis advisor. A. Magislnis thesis advisor. text theses ua 1995 monographic eng ara 151 Leaves : illustrations 30 cm. + specialized By Ashraf Fahim Ali; Supervised Prof. Dr. A.A. Manna, Prof. Dr. A. Fahmy, Prof. Dr. A. Magislnis Thesis (Ph.D)-Cairo University, 1995. Bibliography: pages 144-151 the crude phosphoric acid phosphate and polyphosphate salts EG-GICUC 260215 20260420102411.0 eng