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1Published 1939Subjects: “...Agricultural conservation. http://id.loc.gov/authorities/subjects/sh85002295...”
Electronic resource (PDF)
Government Document eBook -
2Published 1937Subjects: “...Agriculture and state. http://id.loc.gov/authorities/subjects/sh85002484...”
Electronic resource (PDF)
Government Document eBook -
3Published 1939Subjects: “...Agricultural productivity. http://id.loc.gov/authorities/subjects/sh85002401...”
Electronic resource (PDF)
Government Document eBook -
4Published 1940Subjects: “...Agricultural productivity. http://id.loc.gov/authorities/subjects/sh85002401...”
Electronic resource (PDF)
Government Document eBook