Report on the Algorithmic Language ALGOL 60, May 1960; PLUS Revised Report January 1960, in 2 issues of Communications of the ACM.
ACM, volume 3 number 5 (May, 1960) AND volume 6, number 1, January 1963; 2 separate issues of this journal.
ACM, volume 3 number 5 (May, 1960) AND volume 6, number 1, January 1963; 2 separate issues of this journal.