Volume 26.2, Issue 52, January 1992, Pages 59-63
E.A. MABROUK; S.A.A. EL-SALAM; S.S. IBRAHIM
Volume 23.2, Issue 46, July 1990, Pages 68-80
E.A. MABROUK; H. EL-HINDI; H.A.H. SALEM; S.S. IBRAHIM; A.A. FARAHAT
Volume 19.2, Issue 38, January 1988, Pages 40-45
A.A. SIAM; S.S. IBRAHIM; H.A.H. SALEM; F.A. SOLIMAN
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