Meek, F.B. and A.H. Worthen. (1865). Notice on some new types of organic remains from the Coal Measures of Illinois. Proceedings of the Academy of Natural Sciences of Philadelphia, 17, pp. 41-53.
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Meek, F. B.; Worthen, A. H.
1865
Notice on some new types of organic remains from the Coal Measures of Illinois
Proceedings of the Academy of Natural Sciences of Philadelphia