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:
- Coal-producing region
- Essen valley
- Essen's basin
- Mosel River tributary
- European industrial valley
- River past Dortmund
- River that passes through Essen, Germany
- German industrial area
- German coal valley
- Arnsberg is on it
- Essen's area
- Mülheim an der ___, Germany
- Industrial region of Germany
- Where Dortmund is
- Franco-German border region