. (1976). -. (e14881). Journal of Environmental Studies, 5(5), e14881
. "-" .e14881 , Journal of Environmental Studies, 5, 5, 1976, e14881.
. (1976). '-', Journal of Environmental Studies, 5(5), e14881.
, "-," Journal of Environmental Studies, 5 5 (1976): e14881,
. -. JES. 1976;5(5):e14881 (In Persian).
