Elfridia (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Elfridia" in English language version.

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jstor.org

Thayer, David W. (1985). "New Pennsylvanian Lepospondyl Amphibians from the Swisshelm Mountains, Arizona". Journal of Paleontology. 59 (3): 684–700. ISSN 0022-3360. JSTOR 1304989.

worldcat.org

search.worldcat.org

Thayer, David W. (1985). "New Pennsylvanian Lepospondyl Amphibians from the Swisshelm Mountains, Arizona". Journal of Paleontology. 59 (3): 684–700. ISSN 0022-3360. JSTOR 1304989.