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From the original manuscript survived the following fragments: Graduale, nach Klugseder Gruppe NNG1..
(Ivana Dobcheva, ÖNB)Download this page
Wien, Österreichische Nationalbibliothek, Cod. 3662, Cod3662_Falz_8_9_m – Gradual — https://fragmentarium.ms/view/page/F-w4eu/1719/20907/270