Volume 12.2, Issue 24, September 1984, Pages 194-199
TH. NAFIE; M.S. HASSAN; A.A. AMER; T.A. EL-ALLAWY
Volume 9, Issue 17.18, January 1982, Pages 121-128
TH. NAFIE; T. EL-ALLAWY; A.A. MOTTELIB; S. EL-AMROUSI