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Geological factors affecting roof conditions in some underground coal mines in the southeastern Canadian Rocky Mountains
R. M. Bustin · Geological Survey of Canada
18 sayfa · 1982
Coal / Coal mines and mining / Geology / Ground control (Mining)
Coal Petrology
R. M. Bustin · Geological Assn of Canada
230 sayfa · 1985
Petrology / Coal / Geology / Economic Geology / Composition