. (2001). -. (e17257). GEOGRAPHICAL RESEARCH QUARTERLY, 39(0), e17257
. "-" .e17257 , GEOGRAPHICAL RESEARCH QUARTERLY, 39, 0, 2001, e17257.
. (2001). '-', GEOGRAPHICAL RESEARCH QUARTERLY, 39(0), e17257.
, "-," GEOGRAPHICAL RESEARCH QUARTERLY, 39 0 (2001): e17257,
. -. GEOGRAPHICAL RESEARCH QUARTERLY. 2001;39(0):e17257 (In Persian).
