ยุคแคมเบรียน (Thai Wikipedia)

Analysis of information sources in references of the Wikipedia article "ยุคแคมเบรียน" in Thai language version.

refsWebsite
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doi.org

harvard.edu

ui.adsabs.harvard.edu

nih.gov

pubmed.ncbi.nlm.nih.gov

semanticscholar.org

api.semanticscholar.org

stratigraphy.org

  • "Chart/Time Scale". www.stratigraphy.org. International Commission on Stratigraphy.
  • Brasier, Martin; Cowie, John; Taylor, Michael. "Decision on the Precambrian-Cambrian boundary stratotype" (PDF). Episodes. 17. สืบค้นเมื่อ 6 December 2020.
  • Cooper, Roger; Nowlan, Godfrey; Williams, S. H. (March 2001). "Global Stratotype Section and Point for base of the Ordovician System" (PDF). Episodes. 24 (1): 19–28. doi:10.18814/epiiugs/2001/v24i1/005. สืบค้นเมื่อ 6 December 2020.