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), 2001; 54(2): -.