David R., M.D. Lambert · M.-L. · M. Lambert
| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Medieval Heresy: Popular Movements from the Gregorian Reform to the Reformation | Paperback | 978-0-631-22276-7 (0-631-22276-6) | 2002 |
| The Cathars | Hardcover | 978-0-631-14343-7 (0-631-14343-2) | 1998 |
| The Cathars | Paperback | 978-0-631-20959-1 (0-631-20959-X) | 1998 |