Amir Zaman Khan, P. Shah, Shad K. Khalil and F. H. Taj
Journal of Agronomy 2 ( 3 ): 146 - 152 , 2003
Shad K. Khalil, A. Wahab, A. Zaman Khan and P. Shah
Pakistan Journal of Biological Sciences 4 ( 4 ): 425 - 428 , 2001