返回Google圖書搜尋

Graphic Methods Used in Presenting Agricultural Economics to the Public

其他書名	Address, American Farm Economics Association, Detroit, Mich., December 29, 1938
出版	U.S. Department of Agriculture, Bureau of Agricultural Economics, 1938
URL	http://books.google.com.hk/books?id=prkvtwAACAAJ&hl=&source=gbs_api