This directory contains subroutines written in Fortran 77. form.ps form.tex -- Notes from Lei Zhao about the contents of these directories, and her experiences with the programs. /clean -- subdirectory containing the subroutines extracted from /original. All the programs could be found in "Combinatorial Algorithms" by A. Nijenhuis and H. S. Wilf. /original -- subdirectory containing the original source code from Sloane. /extra -- other useful subroutines in /original but not in the above-mentioned book. /processed -- driver programs and test data for most of these programs, assembled by Ted Lin.