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Topography and geology of coal fields; mining methods; analyses of mine samples; analyses of delivered coal.
Topography and geology of coal fields; mining methods; analyses of mine samples; analyses of delivered coal.
Analyses of Tennessee coals
U. S. Bur. Mines -- Tech. Paper
Nelson, W.A. (Autor:in)
1926
87 pages
1 Fig.
Aufsatz (Zeitschrift)
Englisch
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