Strategies for encouraging miners to stay away from unsupported roof and perform self-protective actions
| Image |  |
|---|---|
| Description | information circular published in 1991 |
| Author/s |
author: Robert H. Peters |
| Publication date | January 1, 1991 |
| Language | English |
| Country of origin | |
| Wikipedia link | |
| Copyright status | |
| Missing/wrong data? | Edit Wikidata item |