 |
|
Proceedings: Fifth International Conference of Directors of Mine Safety Research
| Author: | Greenwald, H. P. |
|---|---|
| Year: | 1950 |
| Document Type: | N/A |
| Series: | United States Bureau of Mines Reports |
| Report Number: | Bulletin 489 |
| Link: | https://digital.library.unt.edu/ark:/67531/metadc12648/ |
Search developed and maintained by the University of Washington Libraries
Copyright 2010