Topic
- Coal mines and mining--Safety regulations19
- Water treatment plants19
- Shelters for the homeless17
- Strip mining17
- Local transit16
- Mineral industries16
- Social security16
- Petroleum industry and trade--United States15
- Rivers15
- Airports14
- Food relief14
- Transportation14
- Health12
- Imports12
- Interstate Highway System12
- Pollution12
- Rental housing12
- 4-H clubs11
- Black Lung Disability Trust Fund (U.S.)11
- Veterans' hospitals11
