Kaar, P. H. <br/><br/>
Stresses in centrally loaded deep beams / by P. H. Kaar. 

 - Skokie, Illinois : atories, Development Department 
 - [8] p. 
 - Bulletin D18 / Portland Cement Association, Research and De-velopment Laboratories, Development Department .
<br/><br/> "Authorized reprint from Proceedings of the Society for Exp-erimental Stress Analysis Vol. 15, No. 1 p. 77, 1957".