- Pennington Research Association. Group 26.1
- Pennington, Leo C.1
- Pennington, Sam R. 1
- Pennsboro Area Industrial Association (Pennsboro, W. Va.)1
- Pennsylvania Federation of Historical Societies.1
- Pennsylvania Historical and Museum Commission. Division of Public Records.1
- Pennsylvania State University. Library. Pennsylvania Historical Collections.1
- Pennsylvania State University. Library. Special Collections Department.1
- Pennsylvania State University. University Libraries.1
- Pennsylvania. General Assembly. Senate. Select Committee on Bridge Across the Ohio River.1
- Penrod, Kenneth E.2
- Penscope (Weirton ed.)1
- Pentacostal Church (Morgantown, W. Va.)1
- People's Appalachian Research Collective.1
- Percival, W. C. (Walter Clement), 1901-3
- Perdue, Robert Keith, 1944-1
- Perkins, Robert Lee, 1938-1
- Perkus, Gerald H.1
- Perlman, Alfred E.1
- Permian Basin Genealogical Society.1
