Subjects
- Poliomyelitis vaccine.1
- Polish Americans -- Michigan -- Detroit.1
- Political conventions -- Michigan -- Detroit.1
- Politicians -- Michigan.1
- Politics and public policy.1
- Popular music -- United States.1
- Potawatomi Indians -- Great Lakes Region (North America)1
- Potawatomi Indians -- Middle West.1
- Printing industry.1
- Prison facilities -- Michigan -- Jackson.1
- Project Telstar.1
- Publicity.1
- Race relations -- Economic aspects -- Michigan -- Detroit.1
- Racism -- United States.1
- Racquets (Game)1
- Radar.1
- Radioisotopes.1
- Railroads.1
- Refugees -- Michigan.1
- Religion -- Miscellanea.1