(2009). . , 14(2), 163-169. doi: 10.22059/jdesert.2009.36337
. "". , 14, 2, 2009, 163-169. doi: 10.22059/jdesert.2009.36337
(2009). '', , 14(2), pp. 163-169. doi: 10.22059/jdesert.2009.36337
. , 2009; 14(2): 163-169. doi: 10.22059/jdesert.2009.36337


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