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- United States. General Accounting Office148
- United States. Congress. Senate. Committee on Governmental Affairs80
- United States. Bureau of the Census68
- United States. Congress. Senate. Committee on Commerce, Science, and Transportation66
- United States. Congress. Senate. Committee on Appropriations43
- United States. Congress. House. Committee on Appropriations38
- United States28
- United States. Congress. Senate. Committee on Energy and Natural Resources25
- United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Science, Technology, and Space23
- United States. Congress. Senate. Committee on Environment and Public Works21
- United States Travel Service20
- United States. Bureau of Labor Statistics20
- United States. National Transportation Safety Board16
- Meserve-Kunhardt Collection (Beinecke Rare Book and Manuscript Library)14
- United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Water Resources, Transportation, and Infrastructure14
- United States. Congress. Senate. Committee on Environment and Public Works. Subcommittee on Environmental Protection13
- United States. Congress. Senate. Committee on Governmental Affairs. Permanent Subcommittee on Investigations13
- United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Aviation12
- United States. Office of Education12
- United States Tariff Commission11