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- United States13
- Library of Congress. Congressional Research Service, issuing body10
- Bracmort, Kelsi6
- United States. Congress. Senate. Committee on Energy and Natural Resources5
- United States. Congress. Senate. Committee on Agriculture, Nutrition, and Forestry4
- United States. Government Accountability Office3
- Graff Zivin, Joshua S.2
- McMinimy, Mark A.2
- National Renewable Energy Laboratory (U.S.), issuing body2
- Perloff, Jeffrey M.2
- United States. Congress. House. Committee on Agriculture. Subcommittee on Conservation, Credit, Energy, and Research2
- United States. Congress. House. Committee on Science, Space, and Technology (2011). Subcommittee on Energy, author2
- United States. Congress. House. Committee on Science, Space, and Technology (2011). Subcommittee on Environment, author2
- United States. Congress. House. Committee on Small Business. Subcommittee on Rural and Urban Entrepreneurship2
- United States. Congress. Senate. Committee on Environment and Public Works2
- United States. Congress. Senate. Committee on Homeland Security and Governmental Affairs. Subcommittee on Regulatory Affairs and Federal Management, author2
- Woolf, Amy F.2
- Air University (U.S.). Air Command and Staff College, issuing body1
- Air University (U.S.). Press, publisher1
- Birch, Amanda Sue1