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Coal Ball Peels (60) |
Coal balls (60) |
Cones (Botany) (60) |
Conifers, Fossil (60) |
Cordaites (60) |
Desmoinian North American Stage (Desmoinesian) (60) |
Geology, Strategraphic--Carboniferous (60) |
Geology, Stratigraphic--Pennsylvanian (60) |
Mature Cone (60) |
Strobilus (60) |