Volume 18, Issue 3, September 1993, Pages 9-24
Abdel Razik Ahmed El-Sayed Zidan; El-Sir El-Tayeb El-Amin
Volume 18, Issue 2, June 1993, Pages 11-33
Abdel Razik Ahmed Zidan
Volume 17, Issue 3, September 1992, Pages 11-33
Abdel Razik Ahmed Zidan
Volume 12, Issue 2, December 1987, Pages 1-20
Abdel Razik Ahmed Zidan