[ACM] CACM 5(04) April 1962

(1957) Communications of the ACM  

Bosak, Robert et al (1962) Bosak, Robert et al "An information algebra: phase 1 report—language structure group of the CODASYL development committee" Donald Knuth and Saul Gorn: letters regarding (1962) Donald Knuth and Saul Gorn: letters regarding "Backus' language" p185