Berthold, Peter Vogelwarte Radolfzell, Radolfzell, Max Planck Institut für Ornithologie, Max Planck Society; Emeritus, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society;
Berthold, P. (1971). Dependence of timing and pattern of annual events on the date of birth in birds. In Proceedings of the International Union of Physiological Sciences (pp. 623). München: Lehmanns.