PERREMANS K (1994) Dutch Ornithological Union Themeday Functional significance of colors and textures in birds: Microscopic feather structures: diagnostic, functional and phylogenetic significance. LIMOSA 67 (4): 177-178.

Dutch Ornithological Union Themeday Functional significance of colors and textures in birds: Microscopic feather structures: diagnostic, functional and phylogenetic significance

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