Volume 23.2, Issue 46, July 1990, Pages 119-125
Y. HEFNAWY; SABAH MOUSTAFA
Volume 23.2, Issue 46, July 1990, Pages 126-135
A. LOTFI; H. YOUSSEF; Y. HEFNAWY; A. EL-TIMAWY; A. NASSAR
Volume 22.2, Issue 44, January 1990, Pages 105-110
Y. HEFNAWY
Volume 22.2, Issue 44, January 1990, Pages 116-121
Y. HEFNAWY
Volume 22.1, Issue 43, September 1989, Pages 100-105
Y. HEFNAWY; SABAH MOUSTAFA; S. FATHI
Volume 22.1, Issue 43, September 1989, Pages 106-112
Y. HEFNAWY; SABAH MOUSTAFA; S. FATHI
Volume 22.1, Issue 43, September 1989, Pages 113-120
Y. HEFNAWY
Volume 22.1, Issue 43, September 1989, Pages 121-127
Y. HEFNAWY
Volume 22.1, Issue 43, September 1989, Pages 128-134
Y. HEFNAWY
Volume 21.2, Issue 42, May 1989, Pages 101-108
Y. HEFNAWY; R.S. REFAI; SABAH MOUSTAFA
Volume 21.1, Issue 41, January 1989, Pages 129-133
Y. HEFNAWY
Volume 21.1, Issue 41, January 1989, Pages 134-139
Y. HEFNAWY; SABAH MOUSTAFA; R.S. REFAI
Volume 18.1, Issue 35, January 1987, Pages 173-180
M. SOBIH; Y. HEFNAWY
Volume 17.1, Issue 33, May 1986, Pages 74-85
A. LOTFI; S. NASR; H. YOUSSEF; H. ABD EL-RAHMAN; Y. HEFNAWY; A. EL-TIMMAWY; R. GOBRAN
Volume 15.2, Issue 30, January 1986, Pages 152-159
A. LOTFI; S. NASR; H. ABDEL-RAHMAN; H. YOUSSEF; Y. HEFNAWY; R. FARGHALLY
Volume 15.1, Issue 29, September 1985, Pages 135-140
H. YOUSSEF; Y. HEFNAWY; H. ABDEL RAHMAN
Volume 14.2, Issue 28, May 1985, Pages 107-114
H. YOUSSEF; A. EL-TIMAWY; Y. HEFNAWY
Volume 14.1, Issue 27, January 1985, Pages 135-140
Y. HEFNAWY; H. YOUSSEF; H. ABDEL-RAHMAN