Subject Topical
- Roads8
- Water quality8
- Bituminous coal industry7
- Coal miners7
- Drug abuse7
- Hydroelectric power plants7
- National Highway System7
- Teachers7
- Vocational education7
- Holidays6
- Municipal water supply6
- Museums6
- Natural gas6
- Nuclear weapons6
- Postal service6
- Public services (Libraries)6
- Retirement6
- Sewage disposal plants6
- Synthetic fuels6
- Voting--United States6