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William B Gower

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Stand Alone

Depletion of Mines in Relation to Invested Capital; A Paper Read at Conference on Mine Taxation, Annual Convention of the American Mining Congress, Denver, Colorado, November 16, 1920
Depletion of Mines in Relation to Invested Capital; a Paper Read at Conference on Mine Taxation, Annual Convention of the American Mining Congress, Denver, Colorado, November 16, 1920