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. (1974). Circannual rhytms in birds with different migratory habits. In E. T. Pengelley (Ed.), Circannual clocks (pp. 55-94). New York, London: Academic Press.