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The Utilization of Our Lands for Crops, Pasture and Forests

L. C. GrayOliver Edwin BakerWilliam Ridgely ChaplineFrancis Joseph MarschnerWard ShepardBernard Otis WeitzRaphael Zon

出版	U.S. Department of agriculture yearbook, 1923
URL	http://books.google.com.hk/books?id=a_GEtQEACAAJ&hl=&source=gbs_api