Browsing Bulletins - Indiana Geol. Survey by Author "Orr, R. William"

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  • Orr, R. William (Indiana Geological Survey, 1971)
    Study of the stratigraphic distribution of 20 species of the platform genera Icriodus, Polygnathus, Palmatolepis?, and Schmidtognathus at 11 subsurface localities in northern Indiana and at 10 supplementary outcrop localities ...

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