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Soil Survey of Howard County, Arkansas
United States. Bureau of Soils
M. Y. Longacre
F. A. Hayes
Hugh Hammond Bennett
出版
U.S. Government Printing Office
, 1919
URL
http://books.google.com.hk/books?id=9FpR6Kih9toC&hl=&source=gbs_api
EBook
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