Iowa bridge problems : hearing before the Subcommittee on Transportation of the Committee on Environment and Public Works, United States Senate, Ninety-fifth Congress, second session, April 3, 1978.
United States.Congress.Senate.Committee on Environment and Public Works.Subcommittee on Transportation.
Washington : U.S. Govt. Print. Off.,
1978.
"Serial no. 95-H50."
Bridges