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Soil Survey of Greene County, Illinois

C. E. DowneyG. W. HudelsonJohn D. AlexanderWalter D. ParksUniversity of Illinois (Urbana-Champaign campus). Agricultural Experiment Station

出版	University of Illinois, Agricultural Experiment Station, 1972
URL	http://books.google.com.hk/books?id=QwtQAQAAMAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN