Twenty-five years of Ontario's mining history :
a review of outstanding developments in the last quarter of a century /
prepared by officers of the Department of Mines.

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Related Names: Ontario. Department of Mines.
Language(s): English
Published: Toronto : H.H. Ball, 1932.
Subjects: Mines and mineral resources > Mines and mineral resources / History.
Mines and mineral resources > Mines and mineral resources / Ontario > Mines and mineral resources / Ontario / History.
Physical Description: 55 pages : illustrations ; 25 cm.
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