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Soil Survey, Wilbarger County, Texas

William Mathis KoosJack C. WilliamsMarvin Leroy Dixon

出版	U.S. Department of Agriculture, Soil Conservation Service, 1962
URL	http://books.google.com.hk/books?id=-YjCibSlMo8C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN