Mattock, Alan H. <br/><br/>
Precast-prestressed concrete bridges.3 further test of cont-inuos girders / by Alan H. Mattock and Paul Kaar. 

 - Skokie, Illinois : atories, Development Department 
 - [34] p. 
 - Bulletin D43 / Portland Cement Association, Research and De-velopment Laboratories, Development Department .