Category:Standard and tentative methods of sampling and testing highway materials - recommended by the Second Conference of State Highway Testing Engineers and Chemists, Washington, D.C., Feb. 23-27, 1920
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Media in category "Standard and tentative methods of sampling and testing highway materials - recommended by the Second Conference of State Highway Testing Engineers and Chemists, Washington, D.C., Feb. 23-27, 1920"
The following 8 files are in this category, out of 8 total.
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Bulletin of the U.S. Department of Agriculture (1913-1923.) (20500460905).jpg 2,094 × 3,520; 601 KB
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FEDLINK - United States Federal Collection (IA standardtentativ949unit).pdf 777 × 1,262, 108 pages; 8.76 MB