Roof drill - New source of low-cost roof strata information : Frizzell, E M; Howie, W L; Bringgs, R C Rock Mechanics Contributions and Challenges: Proc 31st US Symposium, Golden, 18–20 June 1990P505–510. Publ Rotterdam: A A Balkema, 1990

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 140 KB
• Volume: 28
• Category: Article
• ISSN: 0148-9062
• DOI: 10.1016/0148-9062(91)90339-n