Encyclopedias, Almanacs, Transcripts, and Maps
- Harding, Douglas E. (1909-)
- Hardware and Software
- Hardy, Mary M. (ca. 1875)
- Hardy, Sir Alister Clavering (1896-1985)
- Hare, Robert D
- Hares and Rabbits: Leporidae
- Harlequin Fetus
- Harmful Substances, Legal Control of
- Harmonial Society
- Harnessing Solar Power and Earth's Renewable Energy Sources
- Harodim
- Harold E. Edgerton
- Harold Locke Hazen
- Harold Stephen Black
- Harold W. Kroto
- Harriet Quimby
- Harris, Alec (1897-1974)
- Harris, Bertha (1900?-1981)
- Harris, Melvin (1940-)
- Harris, Susannah (ca. 1920)