Pierre Bultynck (1986)
Accuracy and reliability of conodont zones: the Polygnathus asymmetricus "zone" and the Givetian - Frasnian boundary
Bulletin de l'Institut royal des Sciences naturelles de Belgique,Sciences de la Terre, vol. 56 p. 269-280.
18674, GI, F, PALMIC, STRATBIO
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