Source : Free On-Line Dictionary of Computing

lalr.ss
     
         An {LALR1 grammar} {parser generator} written in, and
        outputting, {Scheme} by Mark Johnson .
     
        Version 0.9 (before 1995-10-30).
     
        FTP new/lalr.shar from the {Scheme Repository}.
     
        (1993-05-24)