Plan 9 from Bell Labs’s /usr/web/sources/contrib/steve/root/sys/lib/texmf/doc/latex/base/README.tetex
All files listed in manifest.txt are available from: ftp://ftp.dante.de/tex-archive/macros/latex/base or any CTAN site resp. mirror. If you have problems getting them from there, please contact me directly: Email: te@informatik.uni-hannover.de