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Subject: Clay mining
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Ontario Department of Mines, 1930 Full text available at Brodie Resource LibraryOntario Department of Mines, 1930 Full text available at Brodie Resource Library- Ontario Department of Mines, 1914 Full text available at Brodie Resource LibraryOntario Department of Mines, 1914 Full text available at Brodie Resource Library
Geological Survey of Canada, 1915 Full text available at Brodie Resource LibraryGeological Survey of Canada, 1915 Full text available at Brodie Resource Library
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