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An investigation of the protective values of structural steel paints (1919)
Coye, John S · Ames, Ia., Iowa State College of Agriculture and Mechanic Arts · leaf 33
30 Microphotographs of Panels 126 to 131 126-128 about eighteen months; 129-131 about two yearsPaint · Steel, Structural
Internet Archive · University of California Libraries · Public domain (published before 1931). Free to use for anything.
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