Volume 17.2, Issue 34, September 1986, Pages 44-53
L.A. SALEM; G. KAMEL; A.M.A. ALI; A.H.S. HASSAN; AZIZA A.A. SELIM
Volume 12.2, Issue 24, September 1984, Pages 45-53
L.A. SALEM; H.A. DAGHACH