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