Last seen in:
- Premier Sunday - King Feature Syndicate - Jun 24 2018
- L.A. Times Daily - Oct 27 2016
- L.A. Times Daily - May 26 2015
- New York Times - Jun 24 2014
- New York Times - Nov 4 2013
- L.A. Times Daily - Jun 29 2011
- Thinks.com - Mar 21 2011
- Newsday.com - Dec 26 2010
- Thinks.com - Oct 22 2010
- Thinks.com - Aug 26 2010
Related Clues:
- German industrial center
- Steel-producing valley
- Coal area
- River of Germany's steel-making region
- German mining region
- Moselle feeder
- 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