Hsu, Thomas T. C. <br/><br/>
Torsion of structural concrete: plain concrete rectangular -sections / by Thomas T. C. Hsu. 

 - Skokie, Illinois : atories, Development Department 
 - [42] p. 
 - Bulletin D134 / Portland Cement Association, Research and D-evelopment Department .
<br/><br/> "Authorized reprint from the copyrighted Torsion of Structu-ral Concrete American Concrete Institute Publications SP-18-,203-238 (1968)."