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- United States. Agricultural Research Service4
- Bonin, Richard, 1957-2
- Browning, David (David W.)2
- CBS News Productions, production company2
- CBS News, production company2
- Crop Production National Program (U.S.)2
- Hickey, Todd Michael2
- Kanopy (Firm)2
- Project Muse2
- Rollin, Jean, 1938-20102
- Safer, Morley2
- Stahl, Lesley2
- ARS Climate Change, Soils, and Emissions National Program (U.S.)1
- Briscoe, John1
- Chesnutt, Charles Waddell, 1858-19321
- Fredin, Amy1
- Herbert, Claude-Jacques, 1700-17581
- Hickey, T. M.1
- Michigan Publishing (University of Michigan) publisher1
- NetLibrary, Inc1