TY  - BOOK
TI  - [Fifteenth progress report] : Investigation of prestressed -reinforced concrete for highway bridges / prepared as a par-t of an investigation conducted by the Engineering Experime-ntal Station University Illinois ; in cooperation with the -Division of Highways State of Illinois and U.S. Department- of Commerce Bureau of Public Roads
CY  - Urbana, Ill. : University of Illinois
ER  -