Volume 15.2, Issue 30, January 1986, Pages 174-182
TH. S. NAFIE; A.A. AMER; TH.S. ABD EL-ALL; M.H. KARRAM
Volume 14.2, Issue 28, May 1985, Pages 145-150
H. IBRAHIM; M.H. KARRAM; TH.S. ABD EL ALL; TH. S. NAFIE