Catalog Record: Summarized reports of principal investigations being conducted by the Bureau of Mines, for fiscal year | HathiTrust Digital Library

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Summarized reports of principal investigations being conducted by the Bureau of Mines, for fiscal year ...
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Corporate Author: United States.
Language(s): English
Published: Washington, 1921-
Note: Mimeographed.
At head of title: Department of the Interior ... Bureau of Mines ...
Physical Description: v. 27 cm.
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Full view1919-20 University of California