J. W. Backus. Letter to Greenstadt. April 1957. 4 pages.
J. W. Backus. Letter to Greenstadt. April 1957. 4 pages. Computer History Museum, gift of Dick Sites, access number 102655104. Part of Lot 58 of The Origins of Cyberspace auction, Christie's, February 23, 2005.
Size 271.6 kB - File type application/pdf