Maybe a combination of these — I found this: http://hep.itp.tuwien.ac.at/~www/particle/Doc/debnotes.html http://hep.itp.tuwien.ac.at/~www/particle/Doc/debnotes

Maybe a combination of these — I found this: http://hep.itp.tuwien.ac.at/~www/particle/Doc/debnotes.html http://hep.itp.tuwien.ac.at/~www/particle/Doc/debnotes.html Debian 1.x/2.x days, likely a prominent mirror?