河北鳥屬 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "河北鳥屬" in Chinese language version.

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doi.org

Zhang, Fucheng., Ericson, Per G.P., Zhou, Zhonghe. Description of a new enantiornithine bird from the Early Cretaceous of Hebei, northern China. Canadian Journal of Earth Science. 2004, 41: 1097–107. doi:10.1139/E04-055.