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Pakistan Journal of Biological Sciences 1 ( 4 ): 283 - 284 , 1998
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Pakistan Journal of Biological Sciences 1 ( 4 ): 321 - 325 , 1998
N. Altaf, J. Iqbal and M. S. Ahmad
Pakistan Journal of Biological Sciences 1 ( 4 ): 335 - 338 , 1998
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Pakistan Journal of Biological Sciences 3 ( 6 ): 960 - 962 , 2000