Effects of physical characteristics of coal occurrence and current mining methods on economic recoverability
Weir, John
Effects of physical characteristics of coal occurrence and current mining methods on economic recoverability
bibliogr. p. 562
00167606
Coal measures
Charbon
Gisement potentiel
Evaluation gîte
Géologie minière
Etats Unis
Effects of physical characteristics of coal occurrence and current mining methods on economic recoverability
bibliogr. p. 562
00167606
Coal measures
Charbon
Gisement potentiel
Evaluation gîte
Géologie minière
Etats Unis