Volume 3, Issue 2, December 1978, Pages 1-12
Sayed Ahmed Hassan; Mohamed Abd El-Moniem Tantawy
Volume 3, Issue 2, December 1978, Pages 13-26
Sayed Ahmed Hassan; Mohamed Abd-El-Moneim Tantawy
Volume 3, Issue 2, December 1978, Pages 27-48
Sayed A. Hassan; Mohamed H. El-Maghraby