The phylogenetic significance of the feather character 'flexules'
Brom, T.G.; Visser, H. (1989). The phylogenetic significance of the feather character 'flexules'. Neth. J. Zool. 39(3-4): 226-246
In: Netherlands Journal of Zoology. E.J. Brill: Leiden. ISSN 0028-2960; e-ISSN 1568-542X, more
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