From the description of NASA Letter of Intent to Enter into a Contract with the California Institute of Technology for Research and Development : letter to G.W. Green, Caltech, 1958 Dec 18. (Jet Propulsion Laboratory Library and Archives). WorldCat record id: 733095656
Cushman was a NASA Contracting Officer.
From the description of Termination of All Work on NASW-30, Except for Priliminary Flight Rating Tests in Progress : teletype to General Electric Company, 1959 Dec 11. (Jet Propulsion Laboratory Library and Archives). WorldCat record id: 733100229From the description of Termination of All Work Under Contract NASW-45, Except Precision Auto-pilot : teletype to Convair Astronautics, 1959 Dec 11. (Jet Propulsion Laboratory Library and Archives). WorldCat record id: 733097044