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Subject Topical
- Coal213
- Veterans84
- Education71
- Gasoline64
- Flood control62
- Lungs--Dust diseases62
- Economic development60
- Natural gas60
- Outdoor recreation59
- Reclamation of land--United States49
- Imports48
- Small business46
- Railroads45
- Coal mines and mining44
- Unemployment44
- Women--Suffrage43
- Exports40
- World War, 1939-194539
- Housing37
- Disaster relief36