Encyclopedias, Almanacs, Transcripts, and Maps
- Ummo Hoax
- Unconformities
- Uncovering the Relationship Between Anatomy and Disease
- Underhill, Leah
- Understanding Cults and Spiritual Movements (Research Publication Series)
- Understanding Magazine
- Underwater Exploration
- Underwater Exploration
- Underwood, Peter (1923-)
- Unguents
- Ungulates
- Ungulates
- Unification: Nineteenth-Century Advances in Electromagnetism
- Unified Theories
- Unintended Consequences
- Union Esperitista Cristiana de Filipinas, Inc
- Union of Concerned Scientists
- Union Spirite Bordelaise (Journal)
- Union Spirite Française
- United Lodge of Theosophists