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Creator
- Crop and Soil Science 34
- Henderson, Robert W. (Robert Wesley), 1914-2006 6
Topic
- Graminaceae 34
- Agriculture 33
- Harvesting 25
- Agricultural machinery 21
- Oregon Agricultural College. Experiment Station 6
- Oregon State Agricultural College. Experiment Station 6
- Tall fescue 6
- Hay 3
- Vetch 3
- Tractors 2
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Format
- image/tiff 34