Aeropropulsion 1979 : proceedings of a conference held at NASA Lewis Research Center, Cleveland, Ohi

Washington, D.C. : National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.] : [for sale by the National Technical Information Service], 1979.

Impact for the 80's : proceedings of a conference on selected technology for business and industry h

Washington, D.C. : National Aeronautics and Space Administration, Scientific and Technical Information Office ; [Springfield, Va.] : [For sale by the National Technical Information Service], 1980.

Propulsion controls, 1979 : proceedings of a symposium held at Lewis Research Center, Cleveland, Ohi

Washington, D.C. : National Aeronautics and Space Administration, Scientific and Technical Information Office ; [Springfield, Va.] : [For sale by the National Technical Information Service], 1980.

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.