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Related Clues:
- German river
- Rhine feeder
- Coal-rich European region
- German industrial city
- Essen's river
- German industrial region
- River to the Rhine
- River from the Vosges Mountains
- German coal-producing region
- German industrial locale
- Germany's ___ Valley
- Coal-rich German region
- River to the Mosel
- Essen basin
- German wine valley