Author: | Katell, Sidney. |
---|---|
Additional Authors: | Berkshire, L. H.,, Hemingway, E. L., |
Year: | 1975 |
Document Type: | USBI |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines : |
SUDOC: | I 28.27:8689 |
Series: | Information circular - Bureau of Mines ; |
Report Number: | 8689 |
Subjects: | Bituminous coal--Costs |
Coal mines and mining--United States--Cost of operation | |
Link: | https://hdl.handle.net/2027/mdp.39015078463299 |