Volume 14, Issue 2, December 1989, Pages 60-71
Rizk El-Bealy; Ismail Mousa Mohamed El-Metwally Rakha
Volume 14, Issue 1, June 1989, Pages 48-67
Rizk Abd Allah Mahmoud El-Bealy
Volume 13, Issue 1, June 1988, Pages 1-16
Rizk Abd Allah Mahmoud El-Bealy
Volume 13, Issue 1, June 1988, Pages 17-27
Ismail Rakha; Rizk Abd Allah Mahmoud El-Bealy
Volume 12, Issue 2, December 1987, Pages 12-22
Rizk Abd Allah Mahmoud El-Bealy; S. Ibrahim; Rizk Abd Allah Mahmoud El-Bealy
Volume 12, Issue 1, June 1987, Pages 46-60
Rizk Abd Allah Mahmoud El-Bealy; S. Ibrahim
Volume 6, Issue 1, June 1981, Pages 214-233
Ali Bargash; Rizk Abdullah El-Bealy