Hellmayr on the Avifauna of Timor Zoologie von Timor C. B. Haniel I Lieferung C. E. HellmayrS. · The Auk1914PDF157 KB
Hellmayr's 'Birds of the Americas' Catalogue of Birds of the Americas Charles E. HellmayrS. · The Auk1936PDF164 KB
Hellmayr on the Ornithology of Western Colombia A Contribution to the Ornithology of Western Colombia C. E. HellmayrS. · The Auk1912PDF110 KB
Hellmayr's 'The Birds of the Rio Madeira' The Birds of the Rio Madeira C. E. HellmayrA. · The Auk1911PDF134 KB