Subjects
- Politicians -- Michigan.1
- Popular music -- United States.1
- Presidents -- United States -- Election -- 1840.1
- Presidents -- United States -- Election -- 1956.1
- Presidents -- United States -- Election -- 1968.1
- Printing industry.1
- Prison facilities -- Michigan -- Jackson.1
- Prisons -- Michigan.1
- Progressivism (United States politics)1
- Prohibition -- Michigan.1
- Project Telstar.1
- Public lands -- Michigan.1
- Public welfare -- Michigan -- Washtenaw County.1
- Racquets (Game)1
- Radar.1
- Radio broadcasting -- United States.1
- Radioisotopes.1
- Railroad accidents.1
- Railroad bridges.1
- Railroad cars.1