Biodiversity Heritage Library · page-42050721
Day length and crop yields — Illustration, Page 10
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BHL classifies this scanned page as Illustration. Publication: Day length and crop yields. Publication creators (not identified as the page's illustrator): Parker, M. W. (Marion Wesley), 1907-; Borthwick, H. A. (Harry Alfred), 1898-1974. Contributing institutions: U.S. Department of Agriculture, National Agricultural Library. Bibliographic metadata supplied by BHL under CC0; image rights are separate.
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1942. Day length and crop yields — Illustration, Page 10. https://www.biodiversitylibrary.org/page/42050721
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