. (1990). -. (e25294). Journal of Economic Research (Tahghighat- E- Eghtesadi), 31(45), e25294
. "-" .e25294 , Journal of Economic Research (Tahghighat- E- Eghtesadi), 31, 45, 1990, e25294.
. (1990). '-', Journal of Economic Research (Tahghighat- E- Eghtesadi), 31(45), e25294.
, "-," Journal of Economic Research (Tahghighat- E- Eghtesadi), 31 45 (1990): e25294,
. -. J. Econ. Res. 1990;31(45):e25294 (In Persian).
