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Coal balls (118) |
Cones (Botany) (118) |
Conifers, Fossil (118) |
Cordaites (118) |
Desmoinian North American Stage (Desmoinesian) (118) |
Geology, Strategraphic--Carboniferous (118) |
Geology, Stratigraphic--Pennsylvanian (118) |
Arthopods (117) |
Strobilus (117) |
Coal Ball Peels (106) |