Mechanical mining in some bituminous-coal mines
Subtitle: progress report 7, methods of mining with continuous-mining machines
By: by J. J. Shields ... [et al.].
Contributors: Shields, J. J.
Series: Information circular (United States. Bureau of Mines) -- 7696
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1954
Place of publication: Washington, DC
Language: eng
Number of pages: 118
Subjects: Coal mines and mining -- United States.; Coal-mining machinery.
Notes: 1