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Author/Creator
- United States248
- United States. Congress. Senate. Committee on Environment and Public Works, author86
- United States. Congress. House. Committee on Transportation and Infrastructure45
- United States. President's Commission on Critical Infrastructure Protection37
- Library of Congress. Congressional Research Service, issuing body29
- United States. Congressional Budget Office28
- United States. General Accounting Office27
- United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Economic Development18
- United States. Congress. House. Committee on Transportation and Infrastructure, author18
- United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Highways and Transit (2007- ), author18
- United States. Congress. Office of Technology Assessment18
- United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment, author17
- United States. Congress. Joint Committee on Taxation, author16
- United States. Congress. Senate. Committee on Energy and Natural Resources, author16
- United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Highways and Transit15
- United States. Congress. House. Committee on Ways and Means14
- United States. Congress. Joint Economic Committee14
- United States. Congress. Senate. Committee on Banking, Housing, and Urban Affairs14
- United States. Congress. Senate. Committee on Environment and Public Works14
- United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Water Resources, Transportation, and Infrastructure14