File:Balloons - Helium Plants - Development of helium work carried on under the direction of the Bureau of Mines. Control board, located three miles from Petrolia, Texas - NARA - 20807986.jpg
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![File:Balloons - Helium Plants - Development of helium work carried on under the direction of the Bureau of Mines. Control board, located three miles from Petrolia, Texas - NARA - 20807986.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/d/d2/Balloons_-_Helium_Plants_-_Development_of_helium_work_carried_on_under_the_direction_of_the_Bureau_of_Mines._Control_board%2C_located_three_miles_from_Petrolia%2C_Texas_-_NARA_-_20807986.jpg/800px-thumbnail.jpg)
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Original file (5,362 × 3,560 pixels, file size: 11.76 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 (11.76 MB) | commons>US National Archives bot | Bot-assisted upload of US National Archives Identifer 20807986. |
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