Subjects
- Political elections -- 1970.1
- Politics and government -- 1921-1930.1
- Politics and government -- 1931-1940.1
- Politics and government -- 1939-1945.1
- Politics and government -- 1941-1950.1
- Politics and government -- 1946-1960.1
- Politics and government -- Michigan.1
- Presidents -- United States -- Election -- 1936.1
- Presidents -- United States -- Election -- 1960.1
- Presidents -- United States -- Election -- 1968.1
- Printing industry.1
- Prison facilities -- Michigan -- Jackson.1
- Progressivism (United States politics)1
- Project Telstar.1
- Publicity.1
- Quarrying.1
- Racquets (Game)1
- Radar.1
- Radio broadcasting -- Michigan.1
- Radioisotopes.1