1. Physical and behavioral analysis of dog vocalizations;Bleicher;Am. J. Vet. Res.,1963
2. Arctic Wild;Crisler,1958
3. The Expression of the Emotions in Man and Animals;Darwin,1873
4. Behavior of Wolves, Dogs, and Related Canids;Fox,1971
5. Integrative Development of Brain and Behavior in the Dog;Fox,1971