1. and (1973). Sensory Neurophysiology. New York: Van Nostrand Reinhold.
2. (1960). Logical considerations in the study of animal communication. In and (Eds.), Animal Sounds and Communication. Washington, D. C.: American Institute of Biological Sciences. Pp. 392-430.
3. (1940). The Science and the Mystery of the Cat. New York: Charles Scribner and Sons. Pp. 102-111.
4. Vocalizing in the House-Cat; A Phonetic and Functional Study