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- National Renewable Energy Laboratory (U.S.), issuing body85
- Rocky Mountain Research Station (Fort Collins, Colo.), issuing body27
- Pacific Northwest Research Station (Portland, Or.), issuing body18
- United States. Environmental Protection Agency. Office of Mobile Source Air Pollution Control. Emission Control Technology Division. Technology Assessment and Evaluation Branch, issuing body16
- Northeast Fisheries Science Center (U.S.), issuing body15
- United States. National Marine Fisheries Service, issuing body13
- Thomson, John C.10
- United States. Environmental Protection Agency. Office of Mobile Source Air Pollution Control. Emission Control Technology Division. Standards Development and Support Branch, issuing body10
- United States. Forest Service. Northern Research Station, issuing body10
- Ewing, W. Maurice (William Maurice), 1906-19749
- Pacific Southwest Research Station, issuing body9
- Press, Frank, 1924-8
- United States. Environmental Protection Agency. Office of Mobile Sources. Standards Development and Support Branch, issuing body8
- United States. Forest Service. Southern Research Station, issuing body8
- Donn, William L.7
- Hurlbut, David, 1956-7
- Luskin, Bernard7
- United States. Department of State. Bureau of South and Central Asian Affairs, sponsoring body7
- United States. Environmental Protection Agency. Office of Mobile Source Air Pollution Control. Emission Control Technology Division. Test and Evaluation Branch, issuing body7
- United States. National Air Pollution Control Administration. Division of Motor Vehicle Research and Development, issuing body7