1. Signature systems and kin recognition;Beecher;American Zoologist,1981
2. Sociobiology of bank swallows: Reproductive strategy of the male;Beecher;Science,1979
3. Parent–offspring recognition in bank swallows: I. Natural history;Beecher;Animal Behaviour,1981
4. Parent–offspring recognition in bank swallows. II. Development and acoustic basis;Beecher;Animal Behaviour,1981
5. Individual recognition of voice in the social behavior of birds;Beer,1979