1984
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![[Worker Inspecting Control Panel Gauges, Aransas Plant, United Carbon Co.]](http://farm3.static.flickr.com/2940/14179214844_c762a1f885_m.jpg)
by SMU Libraries Digital Collections
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![[Machinist Checking Temperature of Locomotive Wheel, Texas & Pacific Railway Company]](http://farm4.static.flickr.com/3694/12801574744_f122351ce7_m.jpg)
by SMU Libraries Digital Collections
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![[Niles-Bement-Pond Steam Hammer, Texas & Pacific Railway Company]](http://farm3.static.flickr.com/2821/12801400174_2684b92ab8_m.jpg)
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by U.S. National Archives
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by U.S. National Archives
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by U.S. National Archives
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by U.S. National Archives
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by U.S. National Archives
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