Anthracite Mechanical Mining Investigations Progress Report 4
Subtitle: Status of Bureau of Mines Underground Experimental Work with Lightweight Shearing Machines in Pitching Anthracite Beds.
Contributors: Buch, J.; Allan, A.; Davies, R.
Series: Report of investigations (United States. Bureau of Mines) -- 4798
Publisher: s.n
Published: 1951
Place of publication: S.l
Language: eng
Notes: 1