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Author/Creator
- United States. National Aeronautics and Space Administration290
- United States. Congress. Office of Technology Assessment120
- United States86
- Langley Research Center64
- National Institute of Standards and Technology (U.S.)64
- United States. Environmental Protection Agency. Office of Research and Development48
- United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch46
- National Science Foundation (U.S.)41
- Turner-Fairbank Highway Research Center39
- United States. Department of Energy38
- Ames Research Center35
- Pacific Northwest Research Station (Portland, Or.)34
- United States. Army. Air Corps33
- Rand Corporation31
- Association of Research Libraries. Systems and Procedures Exchange Center30
- United States. Federal Highway Administration30
- National Center for Health Services Research and Health Care Technology Assessment (U.S.)29
- United States. Department of Energy. Office of Energy Research25
- United States. National Highway Traffic Safety Administration25
- National Science Foundation (U.S.). Division of Science Resources Studies22