Encyclopedias, Almanacs, Transcripts, and Maps
- Philon of Byzantium
- Philosophers' Stone
- Philosophical Research Society
- Philosophus
- Philosophy and Particle Physics
- Philosophy of Science: Baconian and Cartesian Approaches
- Phinuit
- Phoebus Aaron Theodor Levene
- Phoenix, William
- Phoenix: New Directions in the Study of Man (Journal)
- Phone-Voyance
- Phoronids
- Phoronids
- Phoronids: Phoronida
- Phosphorus Cycle
- Phosphorus Cycle
- Phosphorus Removal
- Phosphorus Removal
- Photic Zone
- Photic Zone