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American Journal of Applied Sciences 2 ( 11 ): 1529 - 1532 , 2005
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American Journal of Applied Sciences 1 ( 2 ): 76 - 83 , 2004
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American Journal of Applied Sciences 1 ( 1 ): 51 - 53 , 2004
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American Journal of Applied Sciences 1 ( 3 ): 168 - 175 , 2004