Spatial Coverage
- Passaic River Valley1
- Pennsylvania.1
- Philadelphia (Pa.)1
- Phillipsburg (Kan.)1
- Phippsburg1
- Phippsburg (Me.)1
- Platte County (Neb.)1
- Prowers County (Colo.)1
- Pueblo County (Colo.)1
- Pulaski County (Ark.)1
- Republic County (Kan.)1
- Rhode Island1
- Roby (Tex.)1
- Rocksprings (Tex.)1
- Rouen (France)1
- Rowan County (N.C.)1
- Rush County (Kan.)1
- Saline County (Ark.)1
- Salt Lake City (Utah)1
- Samoa1
