Volume 18, Issue 4, December 1993, Pages 1-11
Mohamed Ali Ibrahim Shalaby; A. S. Shaheen; A. El-Sedeek
Volume 18, Issue 1, March 1993, Pages 11-25
Mohamed Ali Ibrahim Shalaby; A. S. Shaheen; A. El-Sedeek
Volume 18, Issue 1, March 1993, Pages 26-34
Mohamed Ali Ibrahim Shalaby; A. S. Shaheen; A. El-Sedeek
Volume 15, Issue 2, December 1990, Pages 27-42
Ahmed Sami Moustafa Ahmed El Deeb; A. Shaheen
Volume 15, Issue 1, June 1990, Pages 47-60
A. Shaheen; Ahmed Sami Mostafa Ahmed El-Deeb