. (1991). -. (e16313). Journal of Environmental Studies, 16(16), e16313
. "-" .e16313 , Journal of Environmental Studies, 16, 16, 1991, e16313.
. (1991). '-', Journal of Environmental Studies, 16(16), e16313.
, "-," Journal of Environmental Studies, 16 16 (1991): e16313,
. -. JES. 1991;16(16):e16313 (In Persian).
