Related Clues:
- Ruhr Valley city
- City on the Ruhr
- City acquired by Prussia, 1802
- Industrial city of Germany
- Dallas player, for short
- German industrial city
- Ruhr city
- Krupp family city
- German Pittsburgh
- Nordrhein-Westfalen city
- Scene of W.W. II aerial attacks
- City NE of Düsseldorf
- Krupp works site
- Krupp works city
- German city