. (1976). -. (e14880). Journal of Environmental Studies, 5(5), e14880
. "-" .e14880 , Journal of Environmental Studies, 5, 5, 1976, e14880.
. (1976). '-', Journal of Environmental Studies, 5(5), e14880.
, "-," Journal of Environmental Studies, 5 5 (1976): e14880,
. -. JES. 1976;5(5):e14880 (In Persian).
