Volume 14, Issue 2, December 1989, Pages 60-71
Rizk El-Bealy; Ismail Mousa Mohamed El-Metwally Rakha
Volume 14, Issue 1, June 1989, Pages 25-36
Ismail Mousa Mohamed El-Metwally Rakha; A. Shahin
Volume 6, Issue 1, June 1981, Pages 170-192
Ali Barghash; A. Hebeish; B. D. Farah; Ismail Mousa Mohamed El-Metwally Rakha