by Harold W. Schmidt with assistance of Jack T. Harper.Scientific and Technical Information Division, Office of Technology Utilization, National Aeronautics and Space Administration1967.<629.13338-S351h>
Scientific and Technical Information Division, National Aeronautics and Space Administration; [for sale by Supt. of Docs., U. S. Govt. Print. Off.]1966 [i.e. 1967]<532.5-S728d>