A. S. Khattab and H. Atil
Pakistan Journal of Biological Sciences 2 ( 4 ): 1178 - 1183 , 1999
Pakistan Journal of Biological Sciences 2 ( 1 ): 31 - 37 , 1999
H. Atil and A.S. Khattab
Pakistan Journal of Biological Sciences 2 ( 1 ): 69 - 73 , 1999