M. Umar Khan, M. Qasim, M. Subhan, M. Jamil and Riazud Din Ahmad
Journal of Applied Sciences 3 ( 7 ): 524 - 529 , 2003
M. Umar Khan, M. Qasim, M. Subhan, Riazud Din Ahmad and Liaquat Ali
Journal of Applied Sciences 3 ( 7 ): 530 - 536 , 2003