Volume 21.2, Issue 42, May 1989, Pages 113-117
A. EL-GED; A.A. EL-BASSIOUNY; A.M. KHALID; MERVET ABD EL-RAHMAN; N. KATAB
Volume 21.1, Issue 41, January 1989, Pages 158-163
A.A. EL-BASSIOUNY; A.S. EL-GAD; A.M. KHALID; F.M. FOAD; G. EL-OLEMY