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- Pears 15
- Croplands 3
- Hay 3
- Food industry and trade--Employees 2
- Horticulture 2
- Lombard, P. B. (Porter B.) 2
- Pear industry 2
- Tree crops 2
- Universities and colleges--Faculty 2
- Canneries 1
- Canning and preserving--Equipment and supplies 1
- Fruit trees 1
- Orchards 1
- Oregon State University. Agricultural Experiment Station 1
