Category:Engineering Magazine, 1916
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Media in category "Engineering Magazine, 1916"
The following 3 files are in this category, out of 3 total.
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Andrew L Riker.JPG 313 × 526; 25 KB
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Harrington Emerson.jpg 538 × 681; 41 KB
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Henry L. Gantt.jpg 550 × 688; 114 KB