. (1991). -. (e16306). Journal of Environmental Studies, 16(16), e16306
. "-" .e16306 , Journal of Environmental Studies, 16, 16, 1991, e16306.
. (1991). '-', Journal of Environmental Studies, 16(16), e16306.
, "-," Journal of Environmental Studies, 16 16 (1991): e16306,
. -. JES. 1991;16(16):e16306 (In Persian).
