Volume 25.2, Issue 50, July 1991, Pages 89-92
A.M. AHMED; S.S. SALLAM
Volume 25.2, Issue 50, July 1991, Pages 93-97
A.M. AHMED; S.S. SALLAM
Volume 24.2, Issue 48, January 1991, Pages 164-170
S.S. SALLAM; AMAL M. EL-SHERIF; N.A. YASSIEN
Volume 21.1, Issue 41, January 1989, Pages 113-118
S.S. SALLAM; RAGAA S. HAFEZ; S.D. MORGAN; H.A. EL-ESSAWY