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. (1973). Proposals for the standardization of the presentation of data of annual events, especially of migration data. Auspicium, 5(Suppl.), 49-57.