外擴筆石 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "外擴筆石" in Chinese language version.

refsWebsite

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1fossiilid.info

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low place

1web.archive.org

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archive.org

Walker, Cyril; Ward, David. Fossils. Smithsonian Handbooks revised, illustrated. Dorling Kindersley. 2002: 46. ISBN 0789489848.

fossiilid.info

Fossiilid.info: Expansograptus. [2017-11-11]. （原始内容存档于2018-02-24）（英语）.

web.archive.org

Fossiilid.info: Expansograptus. [2017-11-11]. （原始内容存档于2018-02-24）（英语）.