Volume 30.2, Issue 60, January 1994, Pages 306-319
T.Y. ABD-EL-MOTELIB; S.S. EL-BALLAL; BAHY EL-GAMAL GALAL
Volume 30.1, Issue 59, October 1993, Pages 277-288
T.Y. ABD-EL-MOTELIB; BAHY EL-GAMAL GALAL
Volume 28.1, Issue 55, October 1992, Pages 174-179
R.S. REFAIE; BAHY EL-GAMAL GALAL
Volume 26.2, Issue 52, January 1992, Pages 110-113
BAHY EL-GAMAL GALAL; R.S. REFAIE; A.A. ABOU EL-AILLA