Eleventh progress report of the investigation of impact of -highway bridges / prepared as a part of an investigation co-nducted by the Engineering Experiment Station University of- Illinois ; in cooperation with the Division of Highways St-ate of Illinois of U.S. Department of Commerce Bureau of Pu-blic Roads 

 - Urbana, Ill. : University of Illinois 
 - [98] p. 
 - Progress report ; no.11 .