Encyclopedias, Almanacs, Transcripts, and Maps
- Peter Henlein
- Peter Jacob Hjelm
- Peter John Olivi
- Peter Kropotkin
- Peter Ludwig Mejdell Sylow
- Peter Mathews
- Peter of Abano (Petrus de Abano)(1250-1318)
- Peter of Colechurch
- Peter Peregrinus Initiates the Scientific Study of Magnets
- Peter Pond
- Peter Schoeffer
- Peter Skene Ogden
- Peters, Alfred Vout (1867-?)
- Petrels and Shearwaters
- Petrels and Shearwaters
- Petri, Richard Julius (1852-1921)
- Petroglyphs and Pictographs
- Petroglyphs and Pictographs
- Petroglyphs and Pictographs
- Petroleum Detection