| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Encyclopedia of Animal Rights and Animal Welfare | 978-1-57958-082-7 | 1998 | Marc Bekoff |
| Explore Colorado: From Plains to Peaks | 978-1-56579-124-4 | 1995 | Frances Alley Kruger |
| Mammals of Colorado | 978-0-87081-333-7 | 1994 | James P. Fitzgerald · David Michael Armstrong |
| Mammals of Colorado, Second Edition | 978-1-60732-047-0 | 2010 | David M. Armstrong · James P. Fitzgerald |
Routledge · University Press of Colorado · Westcliffe Pub