. (1977). -. (e14938). Journal of Environmental Studies, 7(7), e14938
. "-" .e14938 , Journal of Environmental Studies, 7, 7, 1977, e14938.
. (1977). '-', Journal of Environmental Studies, 7(7), e14938.
, "-," Journal of Environmental Studies, 7 7 (1977): e14938,
. -. JES. 1977;7(7):e14938 (In Persian).
