Biodiversity Heritage Library
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By "Gutschick, Raymond C. 1913-"
Phosphatic microfossils from the Ordovician of the United States / Matthew H. Nitecki --, Raymond C. Gutschick --, John E. Repetski --.
By: Nitecki, Matthew H. - Gutschick, Raymond C. - Repetski, John E.,
Publication info: Chicago :Field Museum of Natural History,1975.
Contributed by: University of Illinois Urbana Champaign