Volume 25.2, Issue 50, July 1991, Pages 211-216
G.A. EL-AMRAWI; A.D. ZAKARIA; M.T. NASR
Volume 12.2, Issue 24, September 1984, Pages 227-230
M.T. NASR; H. MANSOUR; A. ABDEL RAHEIM; A. EIDAROOS