Volume 12, Issue 2, December 1987, Pages 9-22
F. F. Zada; Fayez Fahmy Gomaa Areed; E. H. El-Konyally
Volume 12, Issue 2, December 1987, Pages 37-48
F. F. Zada; F. F.G. Areed; E. H. El-Konyally