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Subject
- Financial statements85
- Federal receipts and expenditures77
- Meteorology and weather forecasting58
- Chemistry55
- United States. Department of Agriculture50
- Agricultural pests48
- Agricultural production46
- Agricultural research45
- Animal diseases44
- Insects44
- Plant diseases43
- Forest management42
- Museum acquisitions42
- Museums42
- Smithsonian Institution42
- United States. Department of Agriculture. Bureau of Animal Industry42
- Astronomy41
- Foreign trade41
- National Museum of Natural History39
- Discovery and exploration37