Encyclopedias, Almanacs, Transcripts, and Maps
- Rites of Passage: African Rites
- Rites of Passage: Hindu Rites
- Rites of Passage: Jewish Rites
- Rites of Passage: Mesoamerican Rites
- Rites of Passage: Muslim Rites
- Rites of Passage: Neopagan Rites
- Rites of Passage: North American Indian Rites
- Rites of Passage: Oceanic Rites
- Ritschl, Albrecht
- Ritual Studies
- River Basins
- River Dolphins
- Rnying ma pa (Nyingmapa) School
- Ro?sh Ha-Shanah and Yom Kippur
- road runner
- Rocky Flats Nuclear Plant
- Rocky Mountain Arsenal
- Rocky Mountain Institute
- Rodale Institute
- Rodentia (Rodents)