Konferenzbeitrag
Berthold, P.: Concept of endogenous control of migration in warblers. In: Animal Migration, Navigation, and Homing, S. 275 - 282 (Hg. Schmidt-Koenig, K.; Keeton, W. T.). Animal Migration, Navigation, and Homing, Tübingen, 17. August 1977 - 20. August 1977. Springer, Berlin, Heidelberg, New York (1978)