Public domain
Pittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Undercutting the face, while a miner wires up a Cordox shell before blasting
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Credit linePittsburgh, Pennsylvania (vicinity). Montour no. 4 mine of the Pittsburgh Coal Company. Undercutting the face, while a miner wires up a Cordox shell before blasting. 1942-01-01. Collier, John, Collier, John, Jr.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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