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Photographer
- Henderson, Robert W. (Robert Wesley), 1914-2006 54
Topic
- Sprinkler irrigation 54
- Croplands 25
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- Waste products as fertilizer 3
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- Bullock, Richard M. (Richard Melvin), 1918- 1
- Central Oregon Agricultural Research Center 1
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Region
- Corvallis >> Benton County >> Oregon >> United States 15
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Format
- image/tiff 54
