Author
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.,. . (2006). .. Economics Research, 6(21), 15-55.
.,. . ".", Economics Research, 6, 21, 2006, 15-55.
. .. (2006). '.', Economics Research, 6(21), pp. 15-55.
. ., ".," Economics Research, 6 21 (2006): 15-55,
. .. .. Economics Research. 2006;6(21):15-55 (In Persian).
