Agg, Thomas Radford,  1878- <br/><br/>
The use of Iowa gravel for concrete, 
by T. R. Agg and C. S. Nichols. 
 - Ames, Ia.,  Iowa State College of Agriculture and Mechanic Arts,  1913. 
 - 31 p.  illus., diagrs.  22 cm. 
 - Bulletin 34, Engineering Experiment Station. Good Roads Section .
<br/><br/> At head of title: Bulletin of Iowa State College of Agriculture and Mechanic Arts, vol. XII, Dec. 1, 1913, no. 20. 
<br/><br/><label>LCCN: </label>gs 14000470  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Concrete.<br/>Gravel.
<br/><br/><label>LC Class. No.: </label>TN939  / .A3