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References and Further Reading
Rogers, Lesley and Kaplan, Gisela. (2000) Songs, Roars and Rituals. Communication in birds, mammals and other animals. Harvard University Press, Cambridge.
Catchpole, C. K. & Slater, P. J. B. (1995). Bird Song: Biological Themes and Variations. Cambridge University Press; Cambridge.
Claudia Dreifus. "Revolutionary Etude" Rendered by a Wren:[Interview with Luis F. Baptista] New York Times. (Late Edition (East Coast)).New York, N.Y.: May 16, 2000. pg. F.3
Gareth Huw Davies, Bird Songs on the web at www.pbs.org
Sibley, D.A. (2002). Sibley's Birding Basics. Alfred A. Knopf; New York.
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