Observations on fossil plants from the Devonian of eastern North America. IV. Plant remains from the Catskill Delta deposits of northern Pennsylvania and Southern New York.
Reference:
Arnold,C.A. (1939)
Observations on fossil plants from the Devonian of eastern North America. IV. Plant remains from the Catskill Delta deposits of northern Pennsylvania and Southern New York. Contributions from the Museum of Paleontology. University of Michigan
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