Encyclopedias, Almanacs, Transcripts, and Maps
- Right Whales and Bowhead Whales: Balaenidae
- Rights and Reproduction
- Rights Theory
- Rinaldo des Trois-Echelles du Mayne (d. ca. 1571)
- Ring of Thoth
- Ringger, Peter (1923-)
- Ringtail and Greater Gliding Possums: Pseudocheiridae
- Rio Declaration on Environment and Development
- Risk and Emotion
- Risk and Safety: Overview
- Risk Ethics
- Risk Perception
- Risk Society
- Ristoro d'Arezzo
- Rita Levi-Montalcini
- Rita, A
- Ritual Killings
- River and Stream
- Rivers, Olivia Burnett (Mrs. Doris Wilmer Rivers) (1919-)
- Rivista Di Studi Psichici (Journal)