Cornell University Library · Forgotten Books
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Essais sur la Conception Matérialiste de l'Histoire | 978-1-5276-1475-8 (1-5276-1475-1) | 2018 |
| Socialism and Philosophy: -1907 | 978-1-112-20626-9 (1-112-20626-4) | 2009 |