Author/Creator
- United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch443
- John Wiley & Sons426
- Indie Photobook Library/Larissa Leclair Collection (Beinecke Rare Book and Manuscript Library)390
- Time-Life Books388
- IS & T--the Society for Imaging Science and Technology360
- United States. Environmental Protection Agency351
- Food and Agriculture Organization of the United Nations350
- Wiley InterScience (Online service)342
- Ames Research Center341
- United States. General Accounting Office333
- International Business Machines Corporation. International Technical Support Organization325
- Friedlander, Lee323
- United States. National Aeronautics and Space Administration. Scientific and Technical Information Office306
- Goddard Space Flight Center279
- George C. Marshall Space Flight Center268
- American Institute of Chemical Engineers255
- ScienceDirect (Online service)247
- United States. Bureau of Mines242
- American Society of Mechanical Engineers212
- United States. Environmental Protection Agency. Office of Research and Development205