Document Type : Research Paper
Author
.
.,. . (2001). .. Economics Research, 1(3), 241-245.
.,. . ".", Economics Research, 1, 3, 2001, 241-245.
. .. (2001). '.', Economics Research, 1(3), pp. 241-245.
. ., ".," Economics Research, 1 3 (2001): 241-245,
. .. .. Economics Research. 2001;1(3):241-245 (In Persian).
