"Karlsruhe is one of the four administrative regions (sing. Regierungsbezirk) of Baden-Württemberg, Germany, located in the north-west of the state. It is subdivided into the three ...
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regional associations (sing. Regionalverband): Mittlerer Oberrhein (Middle Upper Rhine), Rhein-Neckar (Rhine-Neckar) and Nordschwarzwald (Northern Black Forest)." - (en.wikipedia.org 30.06.2021)