Encyclopedias, Almanacs, Transcripts, and Maps
- physical constants
- physical units
- Physics and Religion
- Physics of Water
- Phytoremediation
- Phytotoxicity
- Pi??ai Lok?c?rya
- Pi?sudski, Józef
- Piciformes (Woodpeckers and Relatives)
- Pierre Elliott Trudeau Mountain
- Pig-Nose Turtles (Carettochelyidae)
- Pigeons and Doves (Columbidae)
- Pigs (Suidae)
- Pikas (Ochotonidae)
- Pilgrimage: An Overview
- Pilgrimage: Buddhist Pilgrimage in East Asia
- Pilgrimage: Buddhist Pilgrimage in South and Southeast Asia
- Pilgrimage: Contemporary Jewish Pilgrimage
- Pilgrimage: Eastern Christian Pilgrimage
- Pilgrimage: Hindu Pilgrimage