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Narrow Vein Mining and Blasting Techniques, Lupin Mine; Clarke, R W D; in,
Project Summaries: Canada - Northwest
Territories Mineral Development Subsidiary Agreement, 1987 - 1991; Richardson, D G; Irving, M. Geological Survey of Canada, Open
File 2484, 1992 p. 215,
https://doi.org/10.4095/133356 
Open Access