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Active list of permissible explosives and blasting devices approved prior to June 30, 1930.
| Year: | 1930 |
|---|---|
| Document Type: | BMRA |
| Issuing Agency: | U.S. Dept. of Commerce, Bureau of MInes, |
| SUDOC: | I 28.23:3025 |
| Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; |
| Report Number: | 3025 |
| Subject: | Explosives--Safety regulations--1930 |
| Link: | https://hdl.handle.net/2027/mdp.39015077566886 |
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