Bureau of Mines investigates gold in oil shales and its possible recovery

Author: Varley, Thomas,
Year: 1922
Document Type: MAIN
SUDOC: I 28.23:2413
Series: Reports of investigations ;
Report Number: 2413
Subjects: Gold ores
Oil-shales
Link: https://hdl.handle.net/2027/mdp.39015095269042

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