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Earth sciences & physical geography
15
Physical
15
Physique
15
Sciences de la terre & géographie physique
15
chemical
15
chimie
15
mathematical & earth Sciences
15
mathématiques & sciences de la terre
15
Devonian
10
Eastern Belgium
10
Silurian
10
brachiopod
10
corals
10
historical collection
10
Campanian
5
Cretaceous
5
Fossils
5
Maastrichtian
5
historical collections
5