| 261 | Postel, Guillaume (1510-1581) | Linguarum duodecim characteribus differentium Alphabetum | 1538 |
| 262 | Prevost, Anthoine (15..-15..) | Les Regretz Damours faictz par ung amant | 1538 |
| 263 | Proclus (saint, 0390?-0446?) | Ad venerabiles et sanctos episcopos, presbyteros | 1538 |
| 264 | Psellos, Michel (1018-1078) | Arithmetices compendium | 1538 |
| 265 | Psellos, Michel (1018-1078) | Libelli aliquot in Quinque Porphyrii Voces | 1538 |
| 266 | Quintilien (0030?-0100?) | [Declamationes majores. latin. 1538] Declamationes undeviginti | 1538 |
| 267 | Quintilien (0030?-0100?) | [De l'institution oratoire. latin. 1538] Institutionum oratoriarum Libri XII | 1538 |
| 268 | Quintilien (0030?-0100?) | [De l'institution oratoire. latin. 1538] Institutionum oratoriarum libri XII | 1538 |
| 269 | Quintilien (0030?-0100?) | [De l'institution oratoire. latin. 1538] Institutionum oratoriarum libri XII | 1538 |
| 270 | Rebuffi, Pierre (1487-1557) | Concordata inter... papam Leonem X... ac regem Franciscum... Primum... | 1538 |
| 271 | Ringelberg, Joachim Fortius (1499?-15..) | Dialectica | 1538 |
| 272 | Ringelberg, Joachim Fortius (1499?-15..) | ♦ Dialectica et Rhetorica | 1538 |
| 273 | Ringelberg, Joachim Fortius (1499?-15..) | ♦... Rhetorica | 1538 |
| 274 | Roland, Jean (jurisconsulte, 14..-15..) | Confitendi formula juventuti accommodatissima | 1538 |
| 275 | Rösslin, Eucharius (1470?-1526) | De partu hominis et quæ circa ipsum accidunt | 1538 |
| 276 | Sagon, François de (15..-15..) | Le Chant de la paix de France | 1538 |
| 277 | Sagon, François de (15..-15..) | Recueil des Estrenes ♦ pour l'an present 1538.. | 1538 |
| 278 | Savonarole, Jérôme (1452-1498) | An exposicyon after the maner of a contemplacyon upon the .lj. Psalme called Miserere mei Deus, whic... | 1538 |
| 279 | Savonarole, Jérôme (1452-1498) | Dominicæ precationis explanatio cum multis aliis... [et S. JOHANNES CHRYSOSTOMOS, De orando Deum...] | 1538 |
| 280 | Savonarole, Jérôme (1452-1498) | Dominicæ Precationis pia admodum et erudita explanatio | 1538 |
