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Coal Ball Peels (106) |
Coal balls (106) |
Cones (Botany) (106) |
Conifers, Fossil (106) |
Cordaites (106) |
Desmoinian North American Stage (Desmoinesian) (106) |
Geology, Strategraphic--Carboniferous (106) |
Geology, Stratigraphic--Pennsylvanian (106) |
Arthopods (105) |
Strobilus (105) |