Audubon Societies for the Protection of Wild Birds and Animals National Audubon Society Title Bird lore Volume v. 9 (1907) Publisher New York City : Macmillan...
Internet Archive Internet Archive ID: birdsAustraliav2Goul described at URL: https://archive.org/download/birdsAustraliav2Goul/birdsAustraliav2Goul.pdf...
Internet Archive Internet Archive ID: birdsAustraliav5Goul described at URL: https://archive.org/download/birdsAustraliav5Goul/birdsAustraliav5Goul.pdf...
Internet Archive Internet Archive ID: birdsAustraliav4Goul described at URL: https://archive.org/download/birdsAustraliav4Goul/birdsAustraliav4Goul.pdf...
Internet Archive Internet Archive ID: birdsAustraliav6Goul described at URL: https://archive.org/download/birdsAustraliav6Goul/birdsAustraliav6Goul.pdf...
Internet Archive ID: birdsAustraliav3Goul described at URL: https://archive.org/download/birdsAustraliav3Goul/birdsAustraliav3Goul.pdf determination method...
Internet Archive ID: BirdsAsiaJohnGoVIIGoul described at URL: https://archive.org/download/BirdsAsiaJohnGoVIIGoul/BirdsAsiaJohnGoVIIGoul.pdf determination method...
English The is a pdf file of the entire magazine. Main articles are about the Passenger Pigeon determination method or standard: SHA-1...
Internet Archive ID: birdsAustraliav7Goul described at URL: https://archive.org/download/birdsAustraliav7Goul/birdsAustraliav7Goul.pdf determination method...
Internet Archive ID: BirdsAsiaJohnGoVIGoul described at URL: https://archive.org/download/BirdsAsiaJohnGoVIGoul/BirdsAsiaJohnGoVIGoul.pdf determination method...