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Referate / Berg- und Hüttenmännischer Tag ; Bergakademie Freiberg
Berg- und Hüttenmännischer Tag; Bergakademie Freiberg - Freiberg - 1973 - 1988 nachgewiesen
Persistent link: https://www.econbiz.de/10000370491
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Report of the United States Coal commission transmitted pursuant to the act approved September 22, 1922 (Public no. 347)
Hammond, John Hays (contributor) - United States / Coal Commission - 1925
Persistent link: https://www.econbiz.de/10001562264
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Bituminous coal - Detailed labor and engineering studies
Hammond, John Hays (contributor) - United States / Coal Commission - 1925
Persistent link: https://www.econbiz.de/10003367440
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Bituminous coal - Detailed studies of cost of production, investment and profits
Hammond, John Hays (contributor) - United States / Coal Commission - 1925
Persistent link: https://www.econbiz.de/10003367442