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Authors whose works are in public domain in at least one jurisdiction

List of works by Carl Eduard Hellmayr

A contribution to the ornithology of northeastern Brazil ⬇️

Chicago, 1929.

Bericht über die Leistungen in der Naturgeschichte der Vögel ⬇️

series of articles, annually published in the journal "Archiv für Naturgeschichte"

Birds of the James Simpson-Roosevelts Asiatic expedition ⬇️

Chicago, 1929.

Critical notes on the types of little-known species of neotropical birds. Part II ⬇️

London, 1913

New birds from Chile ⬇️

Chicago,1924. | Field Museum of Natural History Library

Paridae, Sittidae und Certhiidae ⬇️

book (1903) by C. E. Hellmayr, vol. 18 of the series "Das Tierreich"

The birds of Chile ⬇️

Chicago: Field Museum of Natural History, 1932.

The birds of the Rio Madeira ⬇️

London,Novitates Zoologicae,1910. | Field Museum of Natural History Library

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