Encyclopedias, Almanacs, Transcripts, and Maps
- Petroleum Extraction
- Petroleum, Economic Uses of
- Petroleum, History of Exploration
- Petrus (Peter) Peregrinus de Maricourt
- Petrus Bonus
- Pfeiffer syndrome
- Pfeiffer Syndrome
- Pfeiffer, Richard Friedrich Johannes (1858-1945)
- Phage Genetics
- Phage Therapy
- Phagocyte and Phagocytosis
- Phalangers
- Phanerozoic Eon
- Pharmaceutics, Issues in Prescribing
- Pharmacotherapy
- Phase State Changes
- Phase Transitions
- Phelps, Eliakim (fl. 1850)
- PhenomeNews (Periodical)
- Phenotype and Phenotypic Variation