Volume 18, Issue 4, December 1993, Pages 26-42
Abdallah Sanad Mohamed El-Toukhy
Volume 17, Issue 3, September 1992, Pages 1-13
Abdallah S. Mohammed El-Toukhy
Volume 17, Issue 2, June 1992, Pages 19-29
Abdallah S. M. El-Toukhy