Volume 31.1, Issue 61, April 1994, Pages 158-165
E.H. ABDEL-HAKIEM; M.E. HAMDY; M.A. SHELAIH
Volume 31.1, Issue 61, April 1994, Pages 166-174
E.H. ABDEL-HAKIEM; M.E. HAMDY; S.I. IBRAHIM
Volume 31.1, Issue 61, April 1994, Pages 175-181
M.E. HAMDY; E.H. ABDEL-HAKIEM