Document Type : Original Article
. (1999). . Library and Information Sciences, 2(4), 159-161.
. "", Library and Information Sciences, 2, 4, 1999, 159-161.
. (1999). '', Library and Information Sciences, 2(4), pp. 159-161.
, "," Library and Information Sciences, 2 4 (1999): 159-161,
. . LIS. 1999;2(4):159-161 (In Persian).
