. (1977). -. (e14921). Journal of Environmental Studies, 7(7), e14921
. "-" .e14921 , Journal of Environmental Studies, 7, 7, 1977, e14921.
. (1977). '-', Journal of Environmental Studies, 7(7), e14921.
, "-," Journal of Environmental Studies, 7 7 (1977): e14921,
. -. JES. 1977;7(7):e14921 (In Persian).
