1. A field guide to the birds;Peterson,1980
2. Beitrag zur Frage des Pneumothyphus;Ritter;Dtsch Arch Klin Med,1879
3. Three cases of probable psittacosis;Vickery;Med News,1904
4. A morphological description of psittacosis virus with the description of a developmental cycle;Bedson;Br J Exp Pathol,1932
5. Pigeons and barn yard fowls as possible sources of human psittacosis or ornithosis;Meyer;Schweiz Med Wochenschr,1941