Subject Topical
- Radioactive wastes8
- Water quality8
- Bituminous coal industry7
- Business7
- Construction7
- Government aid to education7
- Hydroelectric power plants7
- Medicare7
- Occupational training7
- Sewage disposal plants7
- Hospitals6
- Natural gas6
- Nuclear weapons6
- Retirement6
- Synthetic fuels6
- Technology6
- Voting--United States6
- Youth6
- Airlines5
- Artists5