Volume 35.2, Issue 70, July 1996, Pages 248-257
E.K. NAFIE; R.H.M. DOGHAIM; M. EL-NIMR; A.E. AGAG; MONA. HAMOUDA
Volume 35.1, Issue 69, April 1996, Pages 64-75
M.I. ABD EL-AZIZ; A.E. AGAG