. (1977). -. (e14928). Journal of Environmental Studies, 7(7), e14928
. "-" .e14928 , Journal of Environmental Studies, 7, 7, 1977, e14928.
. (1977). '-', Journal of Environmental Studies, 7(7), e14928.
, "-," Journal of Environmental Studies, 7 7 (1977): e14928,
. -. JES. 1977;7(7):e14928 (In Persian).
