P.E. · Paul E. · Paul W. Ewald
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Gregorii I papae Registrum epistolarum, Libri I-VII: BD 1 | 978-3-921575-67-3 (3-921575-67-2) | 1992 | Ludo M. Hartmann | |
| Plague Time: The New Germ Theory of Disease | 978-0-385-72184-4 (0-385-72184-6) | 2002 | ||