[Roland Kunz]

http://www.ptg.org/ptg.htm
http://www.ptg.org/tech.htm
http://www.pianoworld.com/tuners/catune.htm
http://users.joplin.com/~dkvander/piano.html
http://www.mercuri.com/piano_tech.htm
http://www.affleckpianotuning.com/pianotuning.html
http://www.pianotech-atlanta.com/