The Bielefeld interdisciplinary project & Immelmann, K. (1981). Behavioral development: The Bielefeld Interdisciplinary project. Cambridge University Press.
Tohutoru Kātū Chicago (17th ed.)The Bielefeld interdisciplinary project me Klaus Immelmann. Behavioral Development: The Bielefeld Interdisciplinary Project. New York: Cambridge University Press, 1981.
Tohutoro MLA (9th ed.)The Bielefeld interdisciplinary project me Klaus Immelmann. Behavioral Development: The Bielefeld Interdisciplinary Project. Cambridge University Press, 1981.
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