Research and technologic work on coal and related investigations, 1958

Year: 1960
Document Type: USBI
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.27:7970
Series: Information circular / Bureau of Mines ;
Report Number: 7970
Subject: Coal--Research--United States
Link: https://hdl.handle.net/2027/mdp.39015078460907

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