Related Clues:
- Polish border river
- Baltic Sea tributary
- River to the Baltic
- Part of the German/Polish border
- River of Brandenburg
- Frankfurt an der ___
- River of eastern Germany
- River through Opole
- European river
- German-Polish border river
- Germany's ___-Spree Canal
- German / Czech river
- River to the Baltic Sea
- River bordering Germany
- River in Central Europe