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Ottawa: Natural Resources Canada, 2014
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Ottawa: Geological Survey of Canada, 2007
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Ottawa: Geological Survey of Canada, 2018
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Washington, D.C: Energy Information Administration, 2009
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Ottawa: Geological Survey of Canada, 2007
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Ottawa: Geological Survey of Canada, 2007
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2012
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Ottawa: Geological Survey of Canada, 2015
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Ottawa: Geological Survey of Canada, 2014
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Ottawa: Geological Survey of Canada, 2011
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Ottawa: Geological Survey of Canada, 2011
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Ottawa: Geological Survey of Canada, 2010
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Ottawa: Geological Survey of Canada, 2008
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Ottawa: Geological Survey of Canada, 2008
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Ottawa: Geological Survey of Canada, 2007
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Ottawa: Geological Survey of Canada, 2007
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Ottawa: Geological Survey of Canada, 2007
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Ottawa: Geological Survey of Canada, 20XX-
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Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, 2008