1. Birds, gradation of characters Publication: Bethesda, MD : U.S. National Library of Medicine, National Institutes of Health, Health & Human Services, 2009 Subject(s): Feathers -- anatomy & histologyPigmentationGalliformes
2. De vrogallo Publication: [Tiguri : Apud Christ. Froschouerum, 1555] Subject(s): GalliformesNatural History
