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WikiPedia: Tầng_Santon http://stratigraphy.science.purdue.edu/charts/Time... http://norges.uio.no/timescale/Fig18.1_Cret_colA.p... http://web.archive.org/web/20071012165717/http://s... http://web.archive.org/web/20071022060736/http://s... http://www.stratigraphy.org/GSSP/Santonian.html http://www.stratigraphy.org/bak/geowhen/stages/San... http://www.stratigraphy.org/index.php/ics-chart-ti... //tools.wmflabs.org/geohack/geohack.php?language=v... https://web.archive.org/web/20040511104934/http://... https://commons.wikimedia.org/wiki/Category:Santon...