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Some observations on German coal research and developments
Pott-Broche coal-extraction process and plant of Ruhr©·ol G. m. b. H., Bottrop-Welheim, Germany
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Published Year
1940-1949 (2)
Subject
Coal mines and mining--Germany (1)
Coal mines and mining--Germany--Ruhr (Region) (1)
Coal--Germany (1)
Coal--Germany--Ruhr (Region) (1)
Coal--Research--Germany (1)
Coke--Germany--Ruhr (Region) (1)
Author
Lowry, H. H. (2)
Rose, H. J. (2) *
