I want to get a Fortran IV program listing from an old article.
"Computer approach to the continuous variations method for spectrophotometric determination of extraction and formation constants", Werner Likussar, Anal. Chem. 1973, 45, 11, 1926–1931.
The program name is Jobcon, the flow chart is shown in Fig 3, and on page 1929 it says program listings are available on request.