Title
- Record1
- Reductorium morale1
- Register1
- Register of writs1
- Registro del peage d'Arle1
- Registrum alphabeticum1
- Registrum ordinis Cysterciensis1
- Regle et maniere de vivre1
- Regulae1
- Regulations1
- Regulations for monks1
- Religiosorum status triplex1
- Republic1
- Rerum suo tempore gestarum commentarius1
- Responsa1
- Rich man and Lazarus1
- Risālah al-muʻīnīyah fī al-hayʼah ... [etc1
- Risālah fī al-hayʼah al-falakīyah1
- Risālah fī al-waqf1
- Risālah fī masʼalat al-kafāʼah1