Ruggedized minicomputer hardware and software topics - 1981 : proceedings of a conference held in Sa

Washington, D.C. : National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.] : [For sale by the National Technical Information Service], 1981.

Spacecraft charging technology, 1980 : a conference sponsored by U.S. Air Force Geophysics Laborator

Washington, D.C. : National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.] : [For sale by the National Technical Information Service], 1981.