Hognestad, Eivind. <br/><br/>
High strength bars as concrete reinforcement part 1: introd-uction to a series of experimental reports / by Eivind Hog-nestad. 

 - Skokie, Illinois : ies, Development Department 
 - [14] p. 
 - Bulletin D52 / Portland Cement Association, Research and D-evelopment Laboratories, Development Department .