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Spatial Coverage
- North Rhine-Westphalia (Germany)7
- Belgium4
- Netherlands4
- Rhineland-Palatinate (Germany)4
- Cologne (Electorate)3
- Danube River3
- Danube River Watershed3
- Danube River Watershed.3
- Danube River.3
- Hesse (Germany)3
- Lower Saxony (Germany)3
- Netherlands.3
- North Brabant (Netherlands)3
- North Holland (Netherlands)3
- Austria2
- Austria.2
- Baden-Württemberg (Germany)2
- Croatia2
- Croatia.2
- Liège (Belgium : Province)2
