Subjects
- Presidents -- United States -- Election -- 1900.1
- Presidents -- United States -- Election -- 1908.1
- Presidents -- United States -- Election -- 1912.1
- Presidents -- United States -- Election -- 1932.1
- Presidents -- United States -- Election -- 1936.1
- Presidents -- United States -- Election -- 1964.1
- Presidents -- United States -- Election -- 1968.1
- Prison facilities.1
- Prison riots -- Michigan -- 1981.1
- Prisons -- Michigan.1
- Progressivism (United States politics)1
- Public lands -- Michigan.1
- Public utilities -- Michigan.1
- Public welfare -- Michigan -- Washtenaw County.1
- Radicalism -- Michigan -- Ann Arbor.1
- Real estate business -- Michigan.1
- Reconstruction (U.S. history, 1865-1877)1
- Recreation.1
- Resorts -- Michigan -- Mackinac Island.1
- Rites and ceremonies.1