Document Type : Research Paper
Author
.
.,. . (2001). .. Economics Research, 1(3), 229-240.
.,. . ".", Economics Research, 1, 3, 2001, 229-240.
. .. (2001). '.', Economics Research, 1(3), pp. 229-240.
. ., ".," Economics Research, 1 3 (2001): 229-240,
. .. .. Economics Research. 2001;1(3):229-240 (In Persian).
