Anthracite Mechanical-Mining Investigations
Subtitle: Progress Report 5: Recovery of Anthracite in A Steeply Pitching Bed by Induced Caving.
Contributors: Allan, A.; Davies, R.
Series: Report of investigations (United States. Bureau of Mines) -- 5013
Publisher: s.n
Published: 1954
Place of publication: S.l
Language: eng
Notes: 1