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You searched for: Acquisition Source Hetzel, Fred Remove constraint Acquisition Source: Hetzel, Fred Medium print Remove constraint Medium: print Topical Subjects Coal miners. Remove constraint Topical Subjects: Coal miners. Topical Subjects Coal Mines and Mining--Miners at Work. Remove constraint Topical Subjects: Coal Mines and Mining--Miners at Work. Topical Subjects Coal-mining machinery. Remove constraint Topical Subjects: Coal-mining machinery.
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Two miners work with a machine to undercut coal.