M.Ather Mahmood, Abdul Ghafoor, Nadeem Akmal and Umair Ahmad
Journal of Applied Sciences 2 ( 5 ): 596 - 599 , 2002
Umair Ahmad, Abdul Ghafoor and M. Ather Mahmood
Journal of Applied Sciences 2 ( 5 ): 589 - 592 , 2002
Abdul Ghaffor, Umair Ahmad, M. Ather Mahmood and Khalid Mahmood
Journal of Applied Sciences 2 ( 5 ): 604 - 607 , 2002