Encyclopedias, Almanacs, Transcripts, and Maps
- Richard Semon
- Richard Simmons Diet
- Richard Tapia
- Richard Trevithick
- Richard Weston
- Richard Weston
- Richard Wiseman
- Richmond, Cora L(inn) V(ictoria)(1840-1923)
- Richmond, Kenneth Forbes (1882-1945)
- Richmond, Thomas (1796-?)
- Richmond, Zoe Blanche Russell(1888-1986)
- Richter, Dieter Max
- Rickettsia and Rickettsial Pox
- Ridge Characteristics
- Ridley, Hazel (Hurd) (ca. 1900-)
- Rieger Syndrome
- Rifting and Rift Valleys
- Right to Die
- Right to Die, Policy and Law
- Right to Life