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Roswell Geological Society
QE143 .R84 1964
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Roswell Geological Society
QE143 .R84 1968
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Roswell Geological Society
QE143 .R841 v.1
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QE143 .S65 1986
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Society of Economic Paleontologists and Mineralogists. Permian Basin Section. Field Conference (1971)
QE143 .S678