The conodont Iapetognathus and its value for defining the base of the Ordovician System

Author: Miller James Frederick   Repetski John E.   Nicoll Robert S.   Nowlan Godfrey   Ethington Raymond L.  

Publisher: Taylor & Francis Ltd

ISSN: 1103-5897

Source: GFF, Vol.136, Iss.1, 2014-01, pp. : 185-188

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