Scientific and Technical Information Division, National Aeronautics and Space Administration; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]1969.<M256-8>
[by] Arthur W. LeissaScientific and Technical Information Division, National Aeronautics and Space Administration; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]1969