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Bergbau
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A letter to a commissioner of the inland navigation : concerning the Tyrone collieries
Report of the Hollidaysburg and Bennington Railroad & Mining Company
Report to the directors of the Pequa Railroad and Improvement Company
Pequa Rail Road and Improvement Company : act of incorporation, by-laws, &c
Martins Fork Lake Sedimentation Study: Hydraulic Model Investigation
Alloys eliminate toxic hazards in die-proofing
Eliminating toxicity in fusible coring
Low-cost alloy answer to workholding problems