UTRECHT MICROPALEONTOLOGICAL BUllETINS

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1955 b: The conodonts described by A. R. Hadding, 1913. Journ. Pal. vol. 29, pp. 105-111.
1957: Two Ordovician conodont faunas found with zonal graptolites. Geol. Foren. Stockholm
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1960: A Lower-Middle Ordovician succession of conodont faunas. Proc. 21st. Int. Geol. Congr.
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1963: Sedimentary folds and the development of limestone in an Early Ordovician Sea. Sedimentology.
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1964: Conodonts. 196 pp. Elsevier Publ. Compo
1971 a: Vom Anfang, Hochstand und Ende eines Epicontinentalmeeres. Geol. Rundsch. Bnd. 60,
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1971 b: Lower Ordovician conodonts of Europe. Geol. Soc. America. Memoir 127, pp. 21-61.
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Ri'ii'imusoks, A., 1960: Stratigraphy and palaeogeography of the Ordovician in Estonia. Proc. 21st. Int.
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1964: On the stratigraphic significance of the Lower Ordovician conodonts of the Leningrad
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1966: Biostratigraphic distribution of conodonts in the Tremadocian Stage (Ordovician) of the
Leningrad region. Akad. Nauk. SSSR. Doklady. vol. 167, pp. 672-674.
Stauffer, C. R., 1935: The conodont fauna of the Decorah Shale (Ordovician). Journ. Pal. vol. 9, pp.
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1936: Pravognathus, a new name for Heterognathus STAUFFER (not GERARD). Journ. Pal. vol.
10, p. 79.