TY - BOOK AU - Agg,Thomas Radford AU - Nichols,Charles Sabin TI - The use of Iowa gravel for concrete, T2 - Bulletin 34, Engineering Experiment Station. Good Roads Section AV - TN939 .A3 PY - 1913/// CY - Ames, Ia. PB - Iowa State College of Agriculture and Mechanic Arts KW - Concrete KW - Gravel N1 - At head of title: Bulletin of Iowa State College of Agriculture and Mechanic Arts, vol. XII, Dec. 1, 1913, no. 20 ER -