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Sectional notes |
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| Authors: | Marx Koehnke J. C. Campbell E. V. Hardenburg C. A. Henderson H. L. Bailey Chas D. Gaines Pennsylvania |
| Affiliation: | Marx Koehnke,J. C. Campbell,E. V. Hardenburg,C. A. Henderson,H. L. Bailey,Chas D. Gaines,Pennsylvania Department of Agriculture |
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