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Utilissime musicales regule necessitate plaini cantus simplicis contrapuncti: rerum factarum tonozum vsualium: nec non artis accentuandi tam speculatiue practice: accriori lima mundate (1526) Guerson, Guillaume, author, Bates, Joshua, 1788-1864, former owner, donor. MB, Regnault, Fran©ʹois, -approximately 1540, printer · [Paris], [Francʹois Regnault] · leaf 11
5 13 d 51 1c ig ol mir], (p lol NS, wwe NOD Ll EN S Gregorian chants · Counterpoint
Internet Archive · Boston Public Library · Public domain (published before 1931). Free to use for anything.
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