Author: | Huff, J. A. |
---|---|
Additional Authors: | Baker, V. V. |
Year: | 1931 |
Document Type: | MAIN |
Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
SUDOC: | C 22.11:6484 |
Series: | Information circular / Bureau of Mines ; |
Report Number: | 6484 |
Subject: | Mine inspection |
Link: | https://hdl.handle.net/2027/mdp.39015095085968 |