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Labor Used to Produce Vegetables, Estimates by States, 1959

Claude Clarence HarenEarle E. GavettLeo G. HeflinPaul Eugene StricklerRobert Cecil McElroyVictor Gladden Edman

出版	Resource Development Economics Division, Economic Research Service, U.S. Department of Agriculture, 1964
URL	http://books.google.com.hk/books?id=kky40AEACAAJ&hl=&source=gbs_api