丑鸭 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "丑鸭" in Chinese language version.

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archive.org

Jobling, James A. The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. 2010: 193. ISBN 978-1-4081-2501-4.
Sibley, David Allen. The Sibley Guide to Birds. New York: Knopf. 2000: 97. ISBN 0-679-45122-6.