Balzer, R.W. et al, "APAREL: A Parse Request Language",

[ACM] (1969) [ACM] CACM 12(11) (Nov 1969).   Robert M. Balzer

Languages mentioned APAREL {1969} A PArse REquest Language SNOBOL4 {1967} Classic SNOBOL TMG {1965} Compiler writing language VITAL {1967}