| 1241 | Raulin, Jean (1443-1514) | Opus Sermonum De Adventu | 1518 |
| 1242 | Raymond de Peñafort (saint, 1175?-1275) | Summula ♦ septem sacramenta ecclesiastica... complectens | 1516 |
| 1243 | Raymond Lulle (1233?-1315) | Dialectica seu Logica nova | 1516 |
| 1244 | Raymond Lulle (1233?-1315) | Duodecim principia philosophiae | 1516 |
| 1245 | Raymond Lulle (1233?-1315) | Metaphysica nova et philosophiae in Averroistas expostulatio | 1516 |
| 1246 | Raymond Lulle (1233?-1315) | Primum volumen Contemplationum duos libros continens | 1505 |
| 1247 | Rebuffi, Pierre (1487-1557) | Subtilissima necnon utilissima L. unicæ. C. de senten. quæ pro eo quod interest. … repetitio | 1548 |
| 1248 | Reginaldetus, Petrus | Speculum finalis retributionis | 1502 |
| 1249 | Reginaldetus, Petrus | Speculum finalis retributionis nouiter impressum | 1509 |
| 1250 | Ricard de Montcroix (1242?-1320) | Contra sectam Mahumeticam | 1511 |
| 1251 | Ricard de Montcroix (1242?-1320) | Contra sectam Mahumeticam... libellus | 1509 |
| 1252 | Richard de Saint-Victor (1110?-1173) | De superdivina Trinitate theologicum Opus | 1510 |
| 1253 | Richard Fitz Ralph (1295?-1360) | Summa in questionibus Armenorum | 1512 |
| 1254 | Richard, Pierre (de Coutances, 14..-15..) | Petri Richardi artium ac sacre theologie professoris optime meriti Sermonum Opus Super Epistolas et ... | 1518 |
| 1255 | Richardson, Robert (15..-1573) | Exegesis in canonem divi Augustini | 1530 |
| 1256 | Richer, Christophe (1513?-1553) | De rebus Turcarum | 1540 |
| 1257 | Ricius, Alphonsus (14..-15..) | Eruditiones christiane religionis | 1512 |
| 1258 | Rivius, Joannes (1500-1553) | De rhetorica | 1547 |
| 1259 | Rojas Sarmiento, Juan de | Commentariorum in Astrolabium | 1550 |
| 1260 | Rolevinck, Werner (1425-1502) | [Fasciculus temporum. latin. 1512 ca] Fasciculus temporum omnes antiquorum cronicas succincte complectens | 1512 |
