Encyclopedias, Almanacs, Transcripts, and Maps
- Hauptman, Herbert A. (1917- )
- Hawaiian Honeycreepers: Drepanididae
- Hawaiian Island Formation
- Hawaiian Society for Psychical Research
- Hawks and Eagles: Accipitridae
- Haxby, W. (ca. 1878)
- Hay Diet
- Hayam Wuruk
- Hayden, Maria B. (ca. 1852)
- Haynes, Renée (Oriana) (1906-1994)
- Hazard Analysis and Critical Control Points Program (HACCP)
- Hazardous Wastes
- Hazardous Wastes
- Hazardous Wastes and Toxic Substances
- Hazards
- Hazel Tree
- Hazelrigg, John (1860-1941)
- Hazelwood, Robert (Roy) R
- Hazen, Elizabeth (1885-1975)
- Head of Baphomet