Encyclopedias, Almanacs, Transcripts, and Maps
- Ozone Layer and Ozone Hole Dynamics
- P. A. Jacobs
- Pacarana: Dinomyidae
- Pacas: Agoutidae
- Pachacutec Inca Yupanqui
- Pacific Giant Salamanders: Dicamptodontidae
- Pacific Islander American Diet
- Pacific Islander Diet
- Pacific Neuropsychiatric Institute
- Pack, John L(ee) (1927-)
- Pacts with the Devil
- Padrick, Sid (fl. 1965)
- Paeophyta
- Pafnuty Lvovich Chebyshev
- Pagan Alliance
- Page Research Library Newsletter
- Pagenstecher, Gustav (1855-1942)
- Pain and Suffering
- Paine syndrome
- Paine Syndrome