Muhammad Akram Nasir, Attiq Akhtar and Shakil Ahmad
Journal of Biological Sciences 1 ( 4 ): 253 - 255 , 2001
Muhammad Akram Nasir, Attiq Akhtar, Shakil Ahmad and Hafiz Riaz Ali Shah
Journal of Biological Sciences 1 ( 5 ): 334 - 335 , 2001
Muhammad Akram Nasir, Muhammad Afzal and Shakil Ahmad
Pakistan Journal of Biological Sciences 3 ( 11 ): 1858 - 1859 , 2000