Childs, L. D. <br/><br/>
Test to evaluate concrete pavement subbases / by L. D. Chil-ds, B.E. Colley and J. W. Kapernick. 

 - Skokie, Illinois : atories, Development Department 
 - 41 p. 
 - Bulletin D11 / Portland Cement Association, Research and De-velopment Laboratories, Development Department .
<br/><br/> "Reprinted from the Journal of the Highway Division, Procee-dings of the American Society of Civil Engineers, Proc. Pap-er 1297, Vol. 83., HW3, July, 1957".