Mandonnet Texts Online
Two important texts of Pierre Mandonnet are available for free in digital form via the Internet Archive: Des écrits authentiques de S. Thomas d’Aquin (1910) and Bibliographie thomiste (1921). Obviously, these texts have been surpassed in many ways by more up-to-date scholarship but they still have their uses. Some evidence for this is the fact that Des écrits authentiques de S. Thomas d’Aquin has been downloaded 157 times and Bibliographie thomiste has been downloaded 292 times.
The texts are available in several formats, including PDF and Kindle.