Paterson, J. B. "The COBOL sorting verb" pp255-258
(1963)
[ACM] CACM 6(05) May 1963 (1963)
[ACM] CACM 6(05) May 1963 "Proceedings of ACM Sort Symposium, November 29, 30, 1962"
Languages mentioned
COBOL-61
{1961} First revision of CODASYL COBOL
COBOL-61 Extended
{1963} COBOL with FACT features