1. Aerodynamic decelerators - An engineering review
2. Pepper, W. B., Jr. "Parachute Design and Performance for Supersonic Deployment and for the Recovery of Heavy Loads,'* presented at Deutsche Gesellschaft fur Luft-und Raumfahrt E. V., Deutsche Forschungs-und Versuchsanstalt, and Advisory Group for Aerodynamic Deceleration, Technical University of Braunschweig, West Germany, Sept. 15-19, 1969
3. also SC-DC-69-1883, 1969, Sandia Labs., Albuquerque, N. Mex.
4. Recent flight-test results in deploying a 20- ft-diam ribbon parachute.