United States. Bureau of Plant Industry & Knapp, S. A. (1908). Deep fall plowing and seed bed. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Bureau of Plant Industry and Seaman Ashahel Knapp. Deep Fall Plowing and Seed Bed. Washington, D.C.: [publisher not identified], 1908.
MLA (9th ed.) CitationUnited States. Bureau of Plant Industry and Seaman Ashahel Knapp. Deep Fall Plowing and Seed Bed. [publisher not identified], 1908.
Warning: These citations may not always be 100% accurate.