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Subject: Surface crown pillars
DNR Office
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2
CANMET
2
Canada Centre for Mineral and Energy Technology
1
Betournay, M. C.
1
CANADA CENTRE FOR MINERAL AND ENERGY TECHNOLOGY, CANADIAN INSTITUTE OF MINING AND METALLURGY, ONTARIO MINISTRY OF NORTHERN DEVELOPMENT AND MINES, PROCEEDINGS OF THE INTERNATIONAL CONFERENCE TIMMINS, ONTARIO
1
ENERGY, MINES AND RESOURCES CANADA
1
GOLDER ASSOCIATES LIMITED
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