Kaar, Paul H. <br/><br/>
Influence of concrete strength on strand transfer lenght / -by Paul H. Kaar, Robert W. Lafraugh and Mark A. Mass. 

 - Skokie, Illinois : atories, Development Department 
 - [28] p. 
 - Bulletin D71 / Portland Cement Association, Research and De-velopment Laboratories, Development Department .
<br/><br/> "Authorized reprint from copyrighted Journal of the Prestre-ssed Concrete Institute Vol. 8, No. 5, 47-67 (october 1963)-."