Volume 7, Issue 2, December 1998, Pages 75-79
Abd-El Alim Abd-El Alim; Waffia Abd Allah; Mohamed El Sayed; Ashour El-Gammal
Volume 6, Issue 1, June 1997, Pages 12-20
Gamal Shams; Abd El- Alim Abdel El-Alim; Mohamed El Sayed; Taha Mohamed