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2. Paleotectonic investigations of the Pennsylvanian System in the United States
3. Paleotectonic investigations of the Pennsylvanian System in the United States. Part III. Plates
4. Palynological analyses of upper Pennsylvanian coal beds and adjacent strata from the proposed Pennsylvanian system stratotype in West Virginia : a report on the stratigraphic distribution and abundance of upper Pennsylvanian palynomorphs
5. Palynological analyses of upper Pennsylvanian coal beds and adjacent strata from the proposed Pennsylvanian system stratotype in West Virginia : a report on the stratigraphic distribution and abundance of upper Pennsylvanian palynomorphs
6. Palynological studies of lower Pennsylvanian coal beds and adjacent strata of the proposed Pennsylvanian system stratotype in Virginia and West Virginia
7. Palynological studies of lower Pennsylvanian coal beds and adjacent strata of the proposed Pennsylvanian system stratotype in Virginia and West Virginia : a report on the occurrence of lower Pennsylvanian palynomorphs and their thermal alteration
8. Patterns of diagenesis in Lower and Middle Pennsylvanian sandstones of the Illinois Basin, Illinois, Indiana, and Kentucky
9. Pennsylvanian and associated rocks in Wyoming
10. Pennsylvanian and associated rocks in Wyoming,
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