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Soil Survey of Bay County, Michigan

Cash Henry WonserJethro Otto VeatchLee Roy Adolph Schoenmann

出版	[U.S.] Bureau of Chemistry and Soils, 1931
URL	http://books.google.com.hk/books?id=E25WJ68tHeUC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN