. (1993). -. (e17237). GEOGRAPHICAL RESEARCH QUARTERLY, 33(0), e17237
. "-" .e17237 , GEOGRAPHICAL RESEARCH QUARTERLY, 33, 0, 1993, e17237.
. (1993). '-', GEOGRAPHICAL RESEARCH QUARTERLY, 33(0), e17237.
, "-," GEOGRAPHICAL RESEARCH QUARTERLY, 33 0 (1993): e17237,
. -. GEOGRAPHICAL RESEARCH QUARTERLY. 1993;33(0):e17237 (In Persian).
