Digital recovery, modification, and analysis of
Tetra Tech seismic horizon mapping, National
Petroleum Reserve Alaska (NPRA), northern Alaska
by Saltus, R.W., Kulander, C.S., and Potter, C.J.

Software Appendix

These three FORTRAN source codes were compiled and
run on a Sun Solaris system using the standard F77
compiler.  The programs are documented by comment
statements in the code.