. (1976). -. (e14900). Journal of Environmental Studies, 5(5), e14900
. "-" .e14900 , Journal of Environmental Studies, 5, 5, 1976, e14900.
. (1976). '-', Journal of Environmental Studies, 5(5), e14900.
, "-," Journal of Environmental Studies, 5 5 (1976): e14900,
. -. JES. 1976;5(5):e14900 (In Persian).
