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Publisher
- Agricultural Economics Bureau2,224
- Plant Industry Bureau1,835
- Agricultural Adjustment Administration1,733
- Agriculture Department1,413
- Weather Bureau990
- Animal Industry Bureau934
- Forest Service796
- Chemistry and Soils Bureau666
- Entomology and Plant Quarantine Bureau624
- Public Roads Bureau501
- Biological Survey Bureau373
- Entomology Bureau359
- Food and Drug Administration283
- Dairy Industry Bureau279
- Agricultural Engineering Bureau212
- Soil Conservation Service211
- Information Office204
- Experiment Stations Office186
- Home Economics Bureau166
- Extension Service152