Author: | Adams, W. W. |
---|---|
Additional Authors: | Geyer, L. E. |
Year: | 1939 |
Document Type: | N/A |
Issuing Agency: | United States. Bureau of Mines. |
Series: | United States Bureau of Mines Reports |
Report Number: | Bulletin 420 |
Subjects: | Coal mine accidents -- United States -- Statistics -- Periodicals. |
Coal mines and mining -- United States -- Statistics -- Periodicals. | |
Link: | http://digital.library.unt.edu/ark:/67531/metadc12583/ |