Soil survey field book. Field season, 1906.
United States. Soils bureau.
United States. Bureau of Soils.
Washington,Govt. print. off.,1906
A revision of Instructions to field parties and descriptions of soil types, published in 1904.
At head of title: U.S. Department of agriculture. Bureau of soils.
Library of Congress
S591 .A5 1906
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