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Author/Creator
- Library of Congress. Congressional Research Service45
- Kirk, Robert S.21
- United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Transportation17
- Mallett, William9
- United States. Congress. House. Committee on Public Works. Subcommittee on Roads9
- Dilger, Robert Jay, 1954-8
- Maps.com (Firm)8
- United States. Congress. Senate. Committee on Public Works8
- United States7
- United States. Congress. Senate. Committee on Public Works. Subcommittee on Public Roads7
- United States. Government Accountability Office7
- United States. Congress. House. Committee on Roads6
- United States. Congress. House. Committee on Roads and Canals5
- United States. Congress. Senate. Committee on Post Offices and Post Roads5
- United States. Congress. Senate. Committee on Public Works. Subcommittee on Roads5
- United States. General Accounting Office5
- Covington & Burling4
- United States. Bureau of Public Roads4
- United States. Congress. House. Committee on Armed Services4
- United States. Congress. House. Committee on Environment and Public Works4