1. “Importance of Manufacturer Software”;Weaver;Control Engineering,1968
2. “Generalized Process Control Programming Systems”;Ewing;Chemical Engineering Progress,1967
3. “Fill-in-the-Form Programming”;Markham;Control Engineering,1968
4. “New Process Language Uses English Terms”;Gaspar;Control Engineering,1968
5. ISA S61.1, Standard: “Industrial Computer System FORTRAN Procedures for Executive Functions and Process Input-Output, Bit Manipulation and Data and Time Information,” Instrument Society of America, 1972. Revised February 1976.