✦ LIBER ✦
Creighton No 9 shaft - 7, 137 feet sunk in one lift. Conference. 5F, 1R : Redpath, JS J.S. Redpath Ltd. Nth Bay, Ont, CDN Proc. 1st N. Amer. Rapid Excav. Tunnelling Conf. Chicago, June 1972, AIME, V2, P843-–862
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 92 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0148-9062
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