Kaar, Paul H. <br/><br/>
Precast rigid frame buildings: summary of a laboratory inve-stigation / by Paul H. Kaar and Harold W. Conner. 

 - Skokie, Illinois : atories, Development Department 
 - [14] p. 
 - Bulletin D136 / Portland Cement Association, Research and D-evelopment Laboratories, Development Department .