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Statistical Bulletin

F. R. GommeHelen Virginia SmithJules V. PowellPaul Eugene StricklerCarl O. DoescherStephen Martin RaleighDorothy M. Lundquist

出版	Economic Research Service, U.S. Department of Agriculture, 1923
URL	http://books.google.com.hk/books?id=d36RzwEACAAJ&hl=&source=gbs_api