Keywords
(2000). -. Iranian Journal of Natural Resources (Not Publish), 53(2), -.
. "-". Iranian Journal of Natural Resources (Not Publish), 53, 2, 2000, -.
(2000). '-', Iranian Journal of Natural Resources (Not Publish), 53(2), pp. -.
-. Iranian Journal of Natural Resources (Not Publish), 2000; 53(2): -.