1. Avian behavior;Davis,1987
2. New techniques in pet avian behavior modification;Davis,1989
3. Understanding the pet psittacine;Davis,1987
4. Captive behavior and its modification;Harrison,1986
5. Cognition in the African Grey parrot: Preliminary evidence for auditory/vocal comprehension of the class concept;Pepperberg;Anim Learn Behav,1983