Document Type : Research Paper
Authors
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.,. and .,. . (2003). .. Economics Research, 3(8), 199-215.
.,. , and .,. . ".", Economics Research, 3, 8, 2003, 199-215.
. ., . .. (2003). '.', Economics Research, 3(8), pp. 199-215.
. . and . ., ".," Economics Research, 3 8 (2003): 199-215,
. ., . .. .. Economics Research. 2003;3(8):199-215 (In Persian).
