Additional Authors: | McCleary, E. H., Gill, H. R., Clarkson, Alfred., Schrecengost, H. A. |
---|---|
Year: | 1948 |
Document Type: | USBI |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | I 28.27:7468 |
Series: | Information circular / Bureau of Mines ; |
Report Number: | 7468 |
Subject: | Coal mines and mining--Pennsylvania--Safety measures |
Link: | https://hdl.handle.net/2027/mdp.39015077578451 |