Crop protection leaflet.
Description
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| Item Link | Original Source |
|---|---|
| Full view no.1,3-16 | University of California |
| Full view no.1-16 1917-1921 | Pennsylvania State University |
| Full view no.7 1918 | University of Michigan |
| Full view no.10 | University of Michigan |
| Full view no.16 1921 | University of Michigan |