舌羊齒屬 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "舌羊齒屬" in Chinese language version.

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Walker, Cyril（英语：Cyril Walker (palaeontologist)）; Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 297. ISBN 0789489848.

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Walker, Cyril（英语：Cyril Walker (palaeontologist)）; Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 297. ISBN 0789489848.