Saif ur Rehman, Sadia Batool and Rizwana Qadir
Journal of Applied Sciences 2 ( 2 ): 202 - 205 , 2002
Saif ur Rehman, Rizwana Qadir, Sadia Batool and Zahira Batool
Journal of Applied Sciences 2 ( 2 ): 219 - 222 , 2002