Preliminary reserach on agricultural regions in the mixed agro-pastoral reaim of kensu and tsinghat - Washington U.S. Department of Commerce 1966 - 211p. cm. - CEL . ISBN: Standard No.: 11,333 Source: Textual Subjects--Topical Terms: CELSeparate discussions on agricultural economic regions Dewey Class. No.: U.6.417.N55, K6