| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Ecotourism: Sustainable Nature and Conservation Based Tourism | 978-1-57524-072-5 (1-57524-072-6) | 2005 | Ray E. Ashton |
| The Natural History and Management of the Gopher Tortoise Gopherus polyphemus | 978-1-57524-162-3 (1-57524-162-5) | 2007 | " |
P. A. · P. Ashton · P S · P.S. Ashton · Patricia A. · Patricia Sawyer Ashton · s. a. · S. Ashton