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  1. Björn Bergenholtz

    Terpsiphone mutata voeltzkowiana Stresemann, 1924 and others

    • Die Familien Voelschow oder Voeltzkow mit Einschluß der von Voltzkow auf Völtzkow. ... , in Baltische Studien (Neue Folge, Bd. 10), 1906 = here (all in German). Good luck understanding it! ;)
  2. Björn Bergenholtz

    Terpsiphone mutata voeltzkowiana Stresemann, 1924 and others

    Deutsche National Bibliotek (here):
  3. Björn Bergenholtz

    Terpsiphone mutata voeltzkowiana Stresemann, 1924 and others

    Snippet views; here, and here. And, just some (quick) observations re. Mr "Voeltzkow"/"Völtzkow" himself ... Ethnologisches Museum, Staatliche Museen zu Berlin, confirms his years, and dates (here): "Alfred Voeltzkow (14.4.1860 - 29.12.1946), Sammler [Collector]" (even if they also have...
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