. (1990). -. (e25297). Journal of Economic Research (Tahghighat- E- Eghtesadi), 31(45), e25297
. "-" .e25297 , Journal of Economic Research (Tahghighat- E- Eghtesadi), 31, 45, 1990, e25297.
. (1990). '-', Journal of Economic Research (Tahghighat- E- Eghtesadi), 31(45), e25297.
, "-," Journal of Economic Research (Tahghighat- E- Eghtesadi), 31 45 (1990): e25297,
. -. J. Econ. Res. 1990;31(45):e25297 (In Persian).
