| Year: | 1987 |
|---|---|
| Document Type: | USBI |
| Issuing Agency: | The Bureau, |
| SUDOC: | I 28.27:9141 |
| Series: | Information circular ; |
| Report Number: | 9141 |
| Subjects: | Mine ventilation--Congresses |
| Air quality--Measurement--Congresses | |
| Diesel motor exhaust gas--Congresses | |
| Diesel motor--Safety measures--Congresses | |
| Link: | https://hdl.handle.net/2027/mdp.39015078462564 |