@Book{WaeltnerBernhard1976,
author  = "Waeltner, Ernst Ludwig and Bernhard, Michael [Sonst.]",
title   = "Wortindex zu den echten Schriften Guidos von Arezzo",
year    = "1976",
address = "München",
series  = "Veröffentlichungen der Musikhistorischen Kommission",
volume  = "2",
url     = "https://publikationen.badw.de/en/003316454",
}