Topic
- Indians of North America--Culture12
- Water resources development--Law and legislation--United States12
- Agricultural laws and legislation10
- Armed Forces10
- Prisoners of war9
- Missing in action8
- Political campaigns--United States8
- Community health services--United States7
- Military weapons7
- Courts--United States6
- Energy policy--United States6
- Families--United States6
- Nineteen seventies6
- Public Works--United States6
- Campaign management--United States5
- Higher--United States5
- Military education--Law and legislation5
- Taxation Law and legislation--United States5
- Civil service--United States4
- Public welfare administration--United States4
