Research development - key to advances for rapid excavation in hard rock. Conference. 17F, 7T, 35R : Olsen, JJ Bur. Mines, Twin Cities, Minn. USA Atchison, TC Bur. Mines, Twin Cities, Minn. USA Proc. 1st N. Amer. Rapid Excav. Tunnelling Conf. Chicago, June 1972, AIME, V.2, 1972, P1393–1441

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 106 KB
• Volume: 12
• Category: Article
• ISSN: 0148-9062
• DOI: 10.1016/0148-9062(75)91413-8