Encyclopedias, Almanacs, Transcripts, and Maps
- propanone
- Propellants
- Propellers
- Prophecy: African Prophetism
- Prophecy: An Overview
- Prophecy: Biblical Prophecy
- Prophecy: Prophecy in Post-Biblical Judaism
- Prophet, Mark and Elizabeth Clare
- Proserpine
- protoctist
- Protostomes and Humans
- Protura (Proturans)
- Przyluski, Jean
- Psellus, Michael
- Pseudo Babblers (Pomatostomidae)
- pseudomorphism
- Psittaciformes (Parrots)
- Psocoptera (Book Lice)
- Psychedelic Drugs
- Psychology