File:Collier's 1921 Coal - mining with an electric drill.jpg
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Original file (1,470 × 821 pixels, file size: 270 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 18:29, 25 October 2017 | 1,470 × 821 (270 KB) | Bob Burkhardt | {{Information |Description ={{en|1=COAL MINING COAL WITH AN ELECTRIC DRILL.}} |Source =“Cotton,” ''Collier's New Encyclopedia'', v. 3, 1921, p. 30. |Author =unknown artist |Date =published 1921 |Permission ={{PD-192... |
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