G. Robson · Gary D. Robson · Gary R.
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Who Pooped in the Park? Big Bend | 978-1-56037-388-9 | 2006 | |
| Who Pooped in the Park? Olympic National Park: Scat and Tracks for Kids | 978-1-56037-337-7 | 2006 | |
| Who Pooped in the Park? Sequoia and Kings Canyon National Parks: Scat and Tracks for Kids | 978-1-56037-327-8 | 2006 | |
| Who Pooped in the Park? Shenandoah National Park: Scat and Tracks for Kids | 978-1-56037-339-1 | 2006 | |
| Who Pooped in the Park? Yellowstone National Park | 978-1-56037-273-8 | 2004 | |
| Who Pooped in the Sonoran Desert? Scat and Tracks for Kids | 978-1-56037-349-0 | 2006 | Robert Rath |