Hognestad, Eivind. <br/><br/>
Shear strength of reinforced structural lightweight aggrega-te concrete slabs / by Eivind Hognestad, Richard C. Elstner-, and J. A. Hanson. 

 - Skokie, Illinois : atories, Development Department 
 - [20] p. 
 - Bulletin D78 / Portland Cement Association, Research and De-velopment Laboratories, Development Department .
<br/><br/> "Authorized reprint from copyrighted Journal of the America-n Concrete Institute June, 1964, Proceedings Vol. 61, p. 64-3."