DescriptionBirds of North and Middle America partV Ridgway.djvu English: The birds of North and middle America: a descriptive catalogue of the higher...
DescriptionBirds of North and Middle America partIII Ridgway.djvu English: The birds of North and middle America: a descriptive catalogue of the higher...
English applies to jurisdiction: United States of America determination method or standard: SHA-1...
DescriptionMeasurements of birds.djvu English: Cleveland, Ohio,1931 Date 8 August 2012 Source https://archive.org/details/measurementsofbi00bald Author...
DescriptionCondor5.djvu English: Volume 5 of The Condor Date 1903 Source https://archive.org/details/condorvolume00socigoog at the Internet Archive Author...
DescriptionCondor20(2).djvu English: The Condor, volume 20, issue 2 Date 1918 Source http://elibrary.unm.edu/sora/Condor/files/issues/v020n02/index.php...
DescriptionCondor12(2).djvu English: The Condor, volume 12, issue 2 Date 1910 Source http://elibrary.unm.edu/sora/Condor/files/issues/v012n02/index.php...
DescriptionCondor5(1).djvu English: The Condor, vol 5, iss 1 Date May 1903 Source http://elibrary.unm.edu/sora/Condor/files/issues/v005n01/index.php Author...
DescriptionCondor19(3).djvu English: The Condor, volume 19, issue 3 Date 1917 Source http://elibrary.unm.edu/sora/Condor/files/issues/v019n03/index.php...
DescriptionCondor15(4).djvu English: The Condor, volume 15, issue 4 Date 1913 Source http://elibrary.unm.edu/sora/Condor/files/issues/v015n04/index.php...