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Publisher
- Agricultural Economics Bureau2,188
- Plant Industry Bureau1,840
- Agricultural Adjustment Administration1,715
- Agriculture Department1,384
- Weather Bureau988
- Animal Industry Bureau931
- Forest Service788
- Chemistry and Soils Bureau660
- Entomology and Plant Quarantine Bureau603
- Public Roads Bureau501
- Biological Survey Bureau371
- Entomology Bureau366
- Food and Drug Administration283
- Dairy Industry Bureau276
- Agricultural Engineering Bureau207
- Information Office202
- Soil Conservation Service201
- Experiment Stations Office186
- Home Economics Bureau170
- Extension Service149