Douglas E. · J.D. · J. Douglas · J. E.
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Tourism Geography | 978-0-13-148735-2 (0-13-148735-3) | 1995 | Philip G. Davidoff · Doris S. Davidoff |
| Tourism Geography Workbook | 978-0-13-923152-0 (0-13-923152-8) | 1992 | Philip G. Davidoff · Doris S. Davidoff |