| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Return of Royalty: Wild Sheep of North America | 978-O-94O864-33-7 (O-94O864-33-9) | 1999 | Dr. Dale E. Toweill · Dr. Valerius Geist · Ken Carlson · Tom Tietz · Denver Bryan · Michael H. Francis |