Incoming Resources
- Westview Press, Boulder, Colo., 2004
- Sounds True, Boulder, Colo., c2011
- Denver Zoological Foundation, Denver, Colo., c1995, Roberts Rinehart Publishers, Boulder, Colo.
- Johnson Books, Boulder, Colo., c1999
- Gaiam, Boulder, Colo., c2011
- Westview Press, Boulder, Colo., 2003
- Brewers Publications, Boulder, Colo., c2003
- Westview Press, Boulder, Colo., 1998