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Coal Ball Peels (139) |
Coal balls (139) |
Cones (Botany) (139) |
Conifers, Fossil (139) |
Desmoinian North American Stage (Desmoinesian) (139) |
Geology, Strategraphic--Carboniferous (139) |
Geology, Stratigraphic--Pennsylvanian (139) |
Cordaites (134) |
Arthopods (133) |
Strobilus (133) |