Sakoda, James M., "DYSTAL 2: A General Purpose Extension of FORTRAN"

[SIGPLAN] (1979) SIGPLAN Notices 14(01) January 1979  

Languages mentioned DYSTAL {1965} Array-based list-processing for Fortran DYSTAL 2 {1967} Array-based list-processing for Fortran SYMBAL {1967} An extension of ALGOL to do formal algebraic manipulation.