Basic estimated capital investment and operating costs for underground bituminous coal mines
Subtitle: mines with annual production of 1.06 to 4.99 million tons from a 72-inch coalbed
By: by Sidney Katell, E. L. Hemingway
Series: Information circular - Bureau of Mines -- 8632; Information circular (United States. Bureau of Mines) -- 8632
Publisher: U.S. Dept. of the Interior, Bureau of Mines : for sale by the Supt. of Docs, U.S. Govt. Print. Off.
Published: 1974
Place of publication: Washington
Language: eng
Number of pages: 41
Subjects: Bituminous coal; Costs; Coal mines and mining; Cost of operation