Biblioteca Centrale Cappuccini - Roma
Capellae Sixtinae Codices musicis notis instructi sive manu scripti sive praelo excusi / recensuit Josephus M. Llorens . – Città del Vaticano : Biblioteca Apostolica Vaticana, 1960 . – xxii, 555 p. ; 25 cm . – (Studi e testi ; 202)

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