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Middle Pennsylvanian fusulinids of the Naco Formation near Winkelman, Gila County, ArizonaWells, A. J., 1934- January 1965 (has links)
No description available.
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Pelycosaurian reptiles from the middle Pennsylvanian of North America.Reisz, Robert. January 1971 (has links)
No description available.
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Pelycosaurian reptiles from the middle Pennsylvanian of North America.Reisz, Robert. January 1971 (has links)
No description available.
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Chonetid mode of lifeGundrum, Lois Elizabeth January 2011 (has links)
Typescript. / Digitized by Kansas Correctional Industries
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Pennsylvanian lepospondyl amphibians from the Swisshelm Mountains, Cochise County, ArizonaThayer, David William, 1944- January 1973 (has links)
No description available.
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