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searching for Rudolf Ruedemann 2 found (5 total)

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Trempealeau Formation (72 words) [view diff] exact match in snippet view article find links to article

MICHIGAN DEPARTMENT OF NATURAL RESOURCES.  "Trempealeau Formation". USGS.  Rudolf Ruedemann (1947). Graptolites of North America. ISBN 9780813710198. 
Dictyonema (graptolite) (241 words) [view diff] exact match in snippet view article
Tremadoc de la Pologne. Palaeontologica Polonica 3: I-XII, 1-235. Rudolf Ruedemann - Graptolites of North America – Geological Society of America