Year: | 1930 |
---|---|
Document Type: | USBI |
Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
SUDOC: | C 22.11:6262 |
Series: | Information circular / United States, Bureau of Mines ; |
Report Number: | 6262 |
Subject: | Smoke prevention--United States |
Link: | https://hdl.handle.net/2027/mdp.39015077576422 |