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Journal of Applied Sciences 8 ( 9 ): 1706 - 1712 , 2008
M. Saif Ur Rehman, Ayyaz Muhammad, Amir Shafeeq, M.A. Chughtai, Arshid Mehmood Ali and Farooq Ahmad
Research Journal of Environmental Sciences 2 ( 5 ): 310 - 315 , 2008