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- Library of Congress. Congressional Research Service653
- Inter-university Consortium for Political and Social Research292
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- University of Michigan. Survey Research Center. Economic Behavior Program176
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- United States. Congress. Senate. Committee on Commerce, Science, and Transportation69
- Practising Law Institute, issuing body47
- Bloomberg News (Firm)36
- United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Telecommunications and the Internet35
- Library of Congress. Congressional Research Service, issuing body31
- United States. Congress. House. Committee on Energy and Commerce. Subcommittee on Commerce, Trade, and Consumer Protection30
- United States. Congress. Senate. Committee on the Judiciary28
- Datamonitor (Firm)27
- Films for the Humanities & Sciences (Firm)27
- Infobase27
- United States. Congress. House. Committee on Commerce. Subcommittee on Telecommunications, Trade, and Consumer Protection27
- European Commission26