Volume 9, Issue 17.18, January 1982, Pages 171-176
SALAH WAHBA; A.A. SAMI; M.S. SABER; N.M. BARHOUMA S.N. IBRAHIM; M.S. SABBAN
Volume 8, Issue 15.16, January 1981, Pages 181-185
A. ABOU ZIED; A.A. SAMI; A.A. BASIONI; N.M. BARHOUMA; S.N. IBRAHIM; M.S. SABBAN