. (1986). -. (e17387). GEOGRAPHICAL RESEARCH QUARTERLY, 21(0), e17387
. "-" .e17387 , GEOGRAPHICAL RESEARCH QUARTERLY, 21, 0, 1986, e17387.
. (1986). '-', GEOGRAPHICAL RESEARCH QUARTERLY, 21(0), e17387.
, "-," GEOGRAPHICAL RESEARCH QUARTERLY, 21 0 (1986): e17387,
. -. GEOGRAPHICAL RESEARCH QUARTERLY. 1986;21(0):e17387 (In Persian).
