Hsu, Thomas T. C. <br/><br/>
Torsion of structural concrete: interaction surface for com-bined torsion, shear, and bending in beams with hout stirru-ps / by Thomas T. C. Hsu. 

 - Skokie, Illinois : atories, Development Department 
 - [34] p. 
 - Bulletin D138 / Portland Cement Association, Research and D-evelopment Laboratories, Development Department .
<br/><br/> "Authorized reprint from copyrighted Journal of the America-n Concrete Institute January 1968, Proceedings, Vol. 65, pp-. 51-60."