Scientific and Technical Information Division, National Aeronautics and Space Administration : for sale by the Supt. of Docs., U.S. Govt. Print Off.1978.<M87-17>
by James A. Dunne and Eric Burgess ; prepared by Jet Propulsion Laboratory, California Institute of TechnologyScientific and Technical Information Division, National Aeronautics and Space Administration : for sale by the Supt. of Docs., U.S. Govt. Print Off.1978