【序号】：1 【作者】：Krukowski, S.T. 【题名】：Sodium metatungstate: a new heavy-mineral separation medium for extraction of conodonts from insoluble residues 【期刊】：Journal of Paleontology 【年卷期】：March 1988; v. 62; no. 2; p. 314-316 【全文链接】http://jpaleontol.geoscienceworld.org/cgi/content/abstract/62/2/314
【序号】：2 【作者】：Brasier MD, Green OR, Jephcoat AP, Kleppe AK, Van Kranendonk MJ, Lindsay JF, Steele A, Grassineau NV. 【题名】：Questioning the evidence for earth’s oldest fossils 【期刊】：Nature 【年卷期】：2002 Mar 7;416(6876):76-81. 【全文链接】http://www.nature.com/nature/journal/v416/n6876/abs/416076a.html
【序号】：3 【作者】：Christopher H. House, J. William Schopf， Kevin D. McKeegan, Christopher D. Coath, T. Mark Harrison and Karl O. Stetter 【题名】：Carbon isotopic composition of individual Precambrian microfossils 【期刊】：Geology; 【年卷期】：August 2000; v. 28; no. 8; p. 707-710 【全文链接】http://geology.geoscienceworld.org/cgi/content/abstract/28/8/707
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