Volume 23.2, Issue 46, July 1990, Pages 88-96
A.M. KHALLIL; Sh.M. AHMED; LAILA, S. AHMED
Volume 22.1, Issue 43, September 1989, Pages 152-158
TH.S. ABDEL ALL; LAILA, S. AHMED; M.N. ISMAIL; M.L MOURAD; A.A. AAMER
Volume 14.2, Issue 28, May 1985, Pages 87-93
M.Kh. IBRAHIM; A.H. BAYOUMI; A.Z. MAHMOUD; LAILA, S. AHMED