Author/Creator
- United States. National Aeronautics and Space Administration1,903
- Langley Research Center1,700
- United States1,267
- Lewis Research Center1,236
- United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch433
- Ames Research Center331
- United States. National Aeronautics and Space Administration. Scientific and Technical Information Office303
- Goddard Space Flight Center273
- George C. Marshall Space Flight Center260
- United States. Environmental Protection Agency256
- United States. General Accounting Office233
- United States. Environmental Protection Agency. Office of Research and Development201
- United States. Environmental Protection Agency. Office of Research and Monitoring191
- U.S. Nuclear Regulatory Commission101
- United States. Environmental Protection Agency. Water Quality Office99
- United States. Federal Aviation Administration90
- United States. Bureau of Mines85
- United Nations Industrial Development Organization84
- Lyndon B. Johnson Space Center83
- Manned Spacecraft Center (U.S.)77