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| Date: | 06 23 1933 |
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| Description: | U.S. Forest Products engineer, George W. Trayer, in the laboratory with a plywood panel, newly developed to provide strength and durability in construction... |
| Date: | 03 28 1929 |
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| Description: | Elevated view from the south east of men constructing the concrete forms for the roof of the addition to the University of Wisconsin-Madison hydraulics lab... |
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