P.G. · P R · Paul G. · Paul R.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Florence in the Age of Dante | 978-0-8061-0617-5 (0-8061-0617-4) | 1968 |
| Versions of medieval comedy | 978-0-8061-1425-5 (0-8061-1425-8) | 1977 |
| Versions of Medieval Comedy | 978-0-8061-1438-5 (0-8061-1438-X) | 1977 |