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- National Science Foundation (U.S.)219
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- United States. Congress. Office of Technology Assessment190
- United States. Department of State173
- United States. National Aeronautics and Space Administration164
- Geological Survey (U.S.)160
- National Cancer Institute (U.S.)128
- United States. Congress. Senate. Committee on Appropriations. Subcommittee on Departments of Labor, Health and Human Services, Education, and Related Agencies125
- United States. Congress. House. Committee on Science106
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- United States. Government Accountability Office100
- United States. Congress. Senate. Committee on Commerce, Science, and Transportation91
- United States. Agricultural Research Service90
- United States. Congress. House. Committee on Science and Technology (2007). Subcommittee on Energy and Environment88
- United States. Congress. House. Committee on Science. Subcommittee on Energy and Environment87
- United States. Congress. Office of Technology Assessment87
- United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Science, Technology, and Space83