TY  - BOOK
ED  - University of Illinois. Engineering Experiment Station
TI  - Sixth progress report of the investigation of prestressed c-oncrete for highway bridges / conducted by the Engineering -Experiment Station University of Illinois ; in cooperation -with the Division of Highways State of Illinois and the U.S-. Department of Commerce Bureau of Public Roads
CY  - Urbana, Ill. : University of Illinois
ER  -