Volume 18, Issue 2, December 1995, Pages 59-67
Hassan M. Mokhtar; Ola A. El-Sayed; Azza H. El-Sabaeny
Volume 18, Issue 2, December 1995, Pages 115-123
Ola A. El-Sayed; Hassan M. Mokhtar; Hoda El-Shamy
Volume 17, Issue 2, December 1994, Pages 113-118
Ola A. El-Sayed
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