. (1991). -. (e16304). Journal of Environmental Studies, 16(16), e16304
. "-" .e16304 , Journal of Environmental Studies, 16, 16, 1991, e16304.
. (1991). '-', Journal of Environmental Studies, 16(16), e16304.
, "-," Journal of Environmental Studies, 16 16 (1991): e16304,
. -. JES. 1991;16(16):e16304 (In Persian).
