(2009). Indexes number 41-48. Journal of Environmental Studies, 34(48), -.
. "Indexes number 41-48", Journal of Environmental Studies, 34, 48, 2009, -.
(2009). 'Indexes number 41-48', Journal of Environmental Studies, 34(48), pp. -.
Indexes number 41-48. Journal of Environmental Studies, 2009; 34(48): -.
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