Date: | 09 20 1956 |
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Description: | Katharine Mather of the Corps of Engineers Waterways Experiment Station checks a computer analysis of the composition of cement. |
Date: | |
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Description: | A man identified as R.S. Wilson, Jr., who is wearing a hat and a suit, gives directions to a truck driver working for Big Rock Stone & Material Co. The ori... |
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Description: | Elevated view of workers putting in concrete to create an apron for the power dam they're building. Two men in suits are standing on a platform on the far ... |
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