Three potential longwall mining methods for thick coal seams in the Western United States
By: by Richard H. Oitto.
Contributors: United States. Bureau of Mines.
Series: Information circular - Bureau of Mines ; 8792; Information circular (United States. Bureau of Mines) -- 8792.
Publisher: Dept. of the Interior, Bureau of Mines : for sale by the Supt. of Docs., U.S. Govt. Print. Off.
Published: 1979
Place of publication: [Washington]
Language: eng
Number of pages: 34
Subjects: Coal mines and mining -- West (U.S.)
Notes: Bibliography: p. 33-34.