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Soil Survey of Hopkins County, Kentucky
Billy C. Weisenberger
James P. Fehr
Maurice E. Humphrey
Arthur J. Richardson
Dan Isgrig
Eullas H. Jacobs
Henry Thomas Converse
出版
Department of Agriculture, Soil Conservation Service
, 1976
URL
http://books.google.com.hk/books?id=8VS40AEACAAJ&hl=&source=gbs_api