File:Balloons - Helium Plants - Development of helium work carried on under direction of the Bureau of Mines. Exterior of main Plant Building, located three miles north of Petrolia, Texas - NARA - 20807998.jpg
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Original file (5,362 × 3,560 pixels, file size: 11.47 MB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:43, 22 September 2017 | 5,362 × 3,560 (11.47 MB) | commons>US National Archives bot | Bot-assisted upload of US National Archives Identifer 20807998. |
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