Encyclopedias, Almanacs, Transcripts, and Maps
- Initiation: Men's Initiation
- Initiation: Women's Initiation
- Injection Well
- Inner Asian Religions
- Innocent I
- Innokentii Veniaminov
- Inquisition, The: The Inquisition in the New World
- Inquisition, The: The Inquisition in the Old World
- Insectivora (Insectivores)
- Insects and Humans
- inside the Earth
- intelligence service
- Intergenerational Justice
- Interlacustrine Bantu Religions
- Internalizing Costs
- International Cleaner Production Cooperative
- International Convention for the Regulation of Whaling (1946)
- International Geosphere-Biosphere Programme (U.N. Environmental Programme)
- International Institute for Sustainable Development
- International Joint Commission