Last seen in:
- The Times - Concise - Times Concise No 9014
- New York Times - Aug 30 2022
- Canadiana - May 9 2022
- Newsday.com - Mar 26 2021
- Newsday.com - Nov 8 2020
- The Times - Concise - Times Concise No 8339
- L.A. Times Daily - Jun 16 2020
- The Washington Post - Jun 16 2020
- New York Times - Nov 24 2019
- Universal - Sep 14 2019
Related Clues:
- Steel-producing valley
- Coal area
- River of Germany's steel-making region
- German mining region
- Moselle feeder
- German coal region
- Rhine valley region
- Where Essen is
- Rhine tributary
- German region
- Region bordering the Rhine
- Essen's valley
- Coal-rich region
- Rhineland region
- River through Mülheim and Dortmund