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1Subjects: “...Geology, Stratigraphic Pennsylvanian....”
Government Document Book -
2by Roberts, Albert Eugene, 1921-Subjects: “...Geology, Stratigraphic Tertiary....”
Published 1972
Government Document Book -
3by Roberts, Albert Eugene, 1921-Subjects: “...Geology, Stratigraphic Mississippian....”
Published 1966
Government Document Book -
4Subjects: “...Geology, Stratigraphic Mississippian. http://id.loc.gov/authorities/subjects/sh85054100...”
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5by Roberts, Albert Eugene, 1921-Subjects: “...Geology, Stratigraphic Cretaceous. http://id.loc.gov/authorities/subjects/sh85054092...”
Published 1972
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Government Document eBook -
6by Roberts, Albert Eugene, 1921-Subjects: “...Geology, Stratigraphic Mississippian. http://id.loc.gov/authorities/subjects/sh85054100...”
Published 1966
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Government Document eBook