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Ruhrgebiet Bergarbeiterstreik Streikaufruf. Strike of coalminers in the Ruhr region Source Wolfgang Kllmann Der Bergarbeiterstreik von Beschlu der Deligirten der Bergleute von Rheinland und Westfalen am Mai im Schtzenhofe zu Bochum de pdold in Bochum Strikes in Germany Coal mining at the Ruhr
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