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Soil Survey, Sumter County, Alabama

Gustavus Adolphus SwensonAlfred Conrad AndersonWilliam Isaac WatkinsBlonnie Hugh WilliamsClarence LounsburyRobert Rankin FindleyLeonard Geoffrey BrackeenMaurice Edward SwannHoyt Sherard

出版	U.S. Government Printing Office, 1941
URL	http://books.google.com.hk/books?id=YxFcZK1_lCYC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN