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The production and use of brown coal in the vicinity of Cologne, Germany

Published Year

• 1910-1919 (1)

Subject

• Briquets (Fuel) industry--Germany--Cologne Region (1)
• Coal mines and mining--Germany--Cologne Region (1)
• Lignite industry--Germany--Cologne Region (1)
• Lignite--Germany--Cologne Region (1)

Author

• Davis, Charles Albert, (1) *

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