| Rudolphi, Petrus |
| Rudorff, Adolfo Federico |
| Ruest (a), Philibertus |
| Ruggeri, Giovanni Battista |
| Ruginelli, Giulio Cesare |
| Ruini, Carlo |
| Ruiz de Moros, Pedro |
| Rules proposed for the government of Gaols, Houses of correction and penitentiaries |
| Rules (Les) des filons et ... |
| Russo-Onesto, Michele |
| Russo-Onesto, M. |
| Rutilius, Bernandinus |
| Ruuk (De), Otto Daniël |
| Ruuk (De), Otto Daniel |
| Rycken, Franciscus Marinus Christianus Res |
| Ryckevorsel (Van), Peter Anton Maria van Oosthuyse |
| Rygerbos, Franciscus |
| -- NON INTESTATA -- |
