Keywords
(2001). -. Iranian Journal of Natural Resources (Not Publish), 54(2), -.
. "-", Iranian Journal of Natural Resources (Not Publish), 54, 2, 2001, -.
(2001). '-', Iranian Journal of Natural Resources (Not Publish), 54(2), pp. -.
, "-," Iranian Journal of Natural Resources (Not Publish), 54 2 (2001): -,
-. Iranian Journal of Natural Resources (Not Publish), 2001; 54(2): -.
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