"Herausgegeben von der Vogelwarte der Staatlichen Biologischen Anstalt auf Helgoland."
no.2 1930
no.3 1931
no.5 1968
no.6 1979
German International Journal Inactive 1979 53040084
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"Herausgegeben von der Vogelwarte der Staatlichen Biologischen Anstalt auf Helgoland."
no.2 1930
no.3 1931
no.5 1968
no.6 1979
German International Journal Inactive 1979 53040084
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