Pierre L Bultynck (1976)
Comparative study of Middle Devonian conodonts from North Michigan (U.S.A.) and the Ardennes (Belgium - France)
The Geological Association of Canada Special Paper, vol. 15 p. 119-141.
16275, 155, 166, 191, 194, 178, 177, 186, N, Lx, SYNDIN, CA, GI, PALMIC, STRATBIO
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