Volume 33.1, Issue 65, April 1995, Pages 88-92
A.M. SAYED; A.M. ABDEL-FATTAH; A.M. MANAA; SAYED A.M.
Volume 33.1, Issue 65, April 1995, Pages 100-104
ِA.M. SAYED; SAYED A.M.; A.M . ABDEL-FATTAH; A.M. MANAA