by Alvin Lieberman and Peter Schipma ; prepared for NASA under contract NASw-1716 by the IIT Research Institute Technology Center, Chicago, IIINational Aeronautics and Space Administration : for sale by the Supt. of Docs., U.S. Govt. Print. Off[1969]
Technology Utilization Division, National Aeronautics and Space Administration; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.]1969.<NA217-44>