A Basic Research Paradigm in Geography - Chakravarti, A. K.; Tiwari, R. C. (Periodicals Archive Online (PAO), 1990)
http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:1129-1990-089-02-000002
Keywords: R