. (1998). -. (e14451). Journal of Environmental Studies, 20(0), e14451
. "-" .e14451 , Journal of Environmental Studies, 20, 0, 1998, e14451.
. (1998). '-', Journal of Environmental Studies, 20(0), e14451.
, "-," Journal of Environmental Studies, 20 0 (1998): e14451,
. -. JES. 1998;20(0):e14451 (In Persian).
