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Review of Bureau of Mines coal program,1965

Review of Bureau of Mines coal program, 1967

Review of Bureau of Mines coal program,1969

Published Year

• 1960-1969 (2)
• 1970-1979 (1)

Subject

• Coal mines and mining (3) *
• Coal preparation (3)
• Coal--Research (2)

Author

• Spencer, John D. (3) *

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