Volume 20, Issue 4, December 1995, Pages 28-37
Ashraf Shaaban; Yousef Abo-Mossalam; Kamal Abed; Nihad El-Chazly
Volume 20, Issue 3, September 1995, Pages 50-61
Tawfik El-Midany; Nihad El-Chazly; Mahmoud El-Bayoumi