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Basal Section (31) |
Coal Ball Peels (31) |
Coal balls (31) |
Cones (Botany) (31) |
Conifers, Fossil (31) |
Cordaites (31) |
Desmoinian North American Stage (Desmoinesian) (31) |
Geology, Strategraphic--Carboniferous (31) |
Geology, Stratigraphic--Pennsylvanian (31) |
Strobilus (31) |