Document Type : Original Article
. (2003). . Library and Information Sciences, 6(4), 139-141.
. "", Library and Information Sciences, 6, 4, 2003, 139-141.
. (2003). '', Library and Information Sciences, 6(4), pp. 139-141.
, "," Library and Information Sciences, 6 4 (2003): 139-141,
. . LIS. 2003;6(4):139-141 (In Persian).
