- Holland Ph.D., Robert F.1
- Holland, Ph.D., Robert F.3
- Home Owners Loan Corporation1
- Hopkins Marine Station6
- Horne, Roland N.9
- Hudgins, Andrew1
- Humboldt County (Calif.) -- Community Development Services1
- Humboldt County Building & Planning Department6
- Humboldt County Community Development Services3
- Humboldt County Community Development Services - Advance Planning Division.1
- Humboldt County Community Development Services -- Advance Planning Division2
- Humboldt, Alexander von, 1769-18591
- Hunt, Raquel4
- Hérisson, Eustache, 1759-1
- I.M. Systems Group6
- IOC (Intergovernmental Oceanographic Commission)1
- IUCN--The World Conservation Union1
- Illingworth Rodkin, Inc.2
- Imprimerie Lemercier et cie1
- InfoUSA1
