| Author: | Adams, William W. | 
|---|---|
| Year: | 1930 | 
| Document Type: | BMRA | 
| Issuing Agency: | United States Bureau of Mines, | 
| SUDOC: | C 22.12:3009 | 
| Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; | 
| Report Number: | 3009 | 
| Subjects: | Industrial safety | 
| Sand and gravel mines and mining--Accidents | |
| Sand and gravel industry--Accidents | |
| Link: | https://hdl.handle.net/2027/mdp.39015077566530 |