Author: | Katell, Sidney. |
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Additional Authors: | Berkshire, L. H.,, Hemingway, E. L., |
Year: | 1975 |
Document Type: | USBI |
Issuing Agency: | Bureau of Mines, |
SUDOC: | I 28.27:8682 |
Series: | Information circular - Bureau of Mines ; |
Report Number: | 8682 |
Subjects: | Bituminous coal--Costs |
Coal mines and mining--United States--Cost of operation | |
Link: | https://hdl.handle.net/2027/mdp.39015078462192 |