Subject
- Quaternary Geologic Period6
- Colonies4
- Mines et ressources minières4
- Ore deposits4
- Steamboat lines4
- Territorial questions4
- Ethnology3
- Geography, Medieval3
- Gîtes minéraux3
- Glacial landforms3
- Languages3
- Nautical charts3
- Aeromagnetische Anomalie2
- Agriculture2
- Anomalies magnétiques2
- Azimuthal equidistant projection (Cartography)2
- Church history2
- Cities and towns2
- Classical geography2
- Coasts2
