Volume 15.1, Issue 29, September 1985, Pages 111-118
A.H. BAYOUMI; L.S. AHMED; M.KH. IBRAHIM; A.Z. MAHMOUD
Volume 12.2, Issue 24, September 1984, Pages 133-137
A.H. BAYOUMI; M.S. YOUSSEF; M.KH. IBRAHIM