Hsu, T. T. C. <br/><br/>
investigation of rail-to-concrete fasteners / by T. T. C. H-su and N. W. Hanson. 

 - Skokie, Illinois : atories, Development Department 
 - [30] p. 
 - Bulletin D146 / Portland Cement Association, Research and D-evelopment Laboratories, Development Department .