Controlling important fungous and insect enemies of the pear in the humid sections of the Pacific Northwest /
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| Main Author: | |
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| Format: | Texto biblioteca |
| Language: | d |
| Published: |
Washington, D.C. : U.S. Dept. of Agriculture,
1919
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| Subjects: | PEAR-DISEASES AND PESTS-NORTHWESTERN STATES, Newcomer, E. J., |
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