Date: | 1926 |
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Description: | Comparative infection of "yellows" in a field of alfalfa and sweet clover. |
Date: | 08 29 1926 |
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Description: | L.L. Olds Seed Company display booth of flowers and seeds at Wisconsin State Fair. |
Date: | 08 09 1934 |
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Description: | Portrait of Erwin Alfonsus, University of Wisconsin entomology department's "bee man," with hand covered with bees. There are beehives in the background. |
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