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Pott-Broche coal-extraction process and plant of Ruhr©·ol G. m. b. H., Bottrop-Welheim, Germany

Published Year

• 1940-1949 (1)

Subject

• Coal mines and mining--Germany--Ruhr (Region) (1)
• Coal--Germany--Ruhr (Region) (1) *
• Coke--Germany--Ruhr (Region) (1)

Author

• Lowry, H. H. (1)
• Rose, H. J. (1) *

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