Hydrocephalus (trilobite) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Hydrocephalus (trilobite)" in English language version.

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agp.org.pl

  • Rushton, A.W.A.; Weidner, T. (2007). "The Middle Cambrian paradoxidid trilobite Hydrocephalus from Jämtland, central Sweden" (PDF). Acta Geologica Polonica. 57 (4): 391–401. Retrieved 30 March 2013.