Document Type : Research Paper
Authors
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.,. and .,. . (2001). .. Economics Research, 1(2), 29-42.
.,. , and .,. . ".", Economics Research, 1, 2, 2001, 29-42.
. ., . .. (2001). '.', Economics Research, 1(2), pp. 29-42.
. . and . ., ".," Economics Research, 1 2 (2001): 29-42,
. ., . .. .. Economics Research. 2001;1(2):29-42 (In Persian).
