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Author/Creator
- American Phytopathological Society8
- United States. Bureau of Entomology and Plant Quarantine6
- Biologische Bundesanstalt für Land- und Forstwirtschaft4
- France. Ministère de l'agriculture4
- Georgia. State Board of Entomology4
- State Plant Board of Florida4
- United States. Agricultural Research Service4
- British Society for Plant Pathology3
- Canada. Division of Botany3
- Commonwealth Mycological Institute (Great Britain)3
- Indonesia. Biro Pusat Statistik3
- Sorauer, Paul, 1839-19163
- Tennessee. State Board of Entomology3
- United States. Federal Horticultural Board3
- Benakeio Phytopathologiko Institouto2
- Boyce Thompson Institute for Plant Research2
- Bromberg. Kaiser Wilhelms-Institut für Landwirtschaft. Abteilung für Pflanzenkrankheiten2
- Canadian Phytopathological Society2
- Centre for Overseas Pest Research (Great Britain)2
- Clinton, G. P. (George Perkins), 1867-19372