Author: | Johnson, Keith A. |
---|---|
Additional Authors: | Yancey, H. F. |
Year: | 1930 |
Document Type: | BMRA |
Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
SUDOC: | C 22.12:3011 |
Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; |
Report Number: | 3011 |
Subject: | Coal |
Links: | https://hdl.handle.net/2027/mdp.39015077566233 |
no.3007-3011 1930 |