Parentless Concepts
- Requesens, Alfons de
- resource
- Ressler, Martin
- restricted access
- Reusner, Adam
- review
- Rhait, Gaspar
- Rhine
- Rhitzsch, Paulus Raphael
- Ribelius, Theodosius
- Riccardi, Vincenzo
- Richard Knolles, The generall historie of the Turkes
- Rigault, Nicolas
- Rihel
- Rinaldius, Philippus
- Ring
- Ring*in
- Rittershausen, Konrad
- Rivet, André
- rm
- Roberto Bellarmino, Doctrina Christiana nunc primum ex Italico idiomate in Arabicum translata per Victorium Scialat et Gabrielem Sionitam
- Roberto, Bellarmino
- Roest, Georg