An official website of the United States government.
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Office of Plant Disease Survey
Description: Staff at the Office of Plant Disease Survey and Pathological Collections
Creators: USDA
Date: ca. 1915
Important soils of the United States
Description: Issued to accompany a collection of soils and subsoils (in 13 boxes) for use of schools and colleges teaching agriculture and physical geography .
Creators: USDA
Date: 1916
