(2016). . , 21(1), 49-55. doi: 10.22059/jdesert.2016.58317
. "". , 21, 1, 2016, 49-55. doi: 10.22059/jdesert.2016.58317
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. , 2016; 21(1): 49-55. doi: 10.22059/jdesert.2016.58317


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