21. Description of the U.S. Army small-scale 2-meter rotor test system [microform] / Arthur E. Phelps III and John D. Berry. Phelps, Arthur E. [Browse] [Washington, DC] : National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [St. Louis, MO] : U.S. Army Aviation Systems Command ; Springfield, Va. : For sale by the National Technical Information Service, 1987. Book, Microform Online Federal Depository Library Program Documents Bookmark
22. A piloted simulation of helicopter air combat to investigate effects of variations in selected performance and control response characteristics [microform] / Michael S. Lewis, M. Hossein Mansur, Robert T. N. Chen. Lewis, Michael S. [Browse] Moffett Field, Calif. : National Aeronautics and Space Administration, Ames Research Center : U.S. Army Aviation Systems Command, [1987] Book Online Federal Depository Library Program Documents Bookmark
23. A mathematical model of the UH-60 helicopter [microform] / Kathryn B. Hilbert. Hilbert, Kathryn B. [Browse] Moffett Field, Calif. : National Aeronautics and Space Administration, Ames Research Center ; St. Louis, Mo. : United States Army Aviation Systems Command, [1984] Book Online Federal Depository Library Program Documents Bookmark