The use of Iowa gravel for concrete, by T. R. Agg and C. S. Nichols.
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TextSeries: Bulletin 34, Engineering Experiment Station. Good Roads SectionPublication details: Ames, Ia., Iowa State College of Agriculture and Mechanic Arts, 1913.Description: 31 p. illus., diagrs. 22 cmSubject(s): LOC classification: - TN939 .A3
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At head of title: Bulletin of Iowa State College of Agriculture and Mechanic Arts, vol. XII, Dec. 1, 1913, no. 20.
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