Oregon Hops & Brewing Archives
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- Oregon State University. Agricultural Experiment Station 26
- Hops 25
- United States. Department of Agriculture 12
- Hops--Diseases and pests 7
- Mints (Plants) 4
- Plant diseases 2
- Barley 1
- California Agricultural Experiment Station 1
- Foote, Wilson H. 1
- Idaho Agricultural Experiment Station 1
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