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Introit and Gradual for the Third Mass of Christmas (Day Mass), from Oxford, Bodleian Library, MS Lat. Liturg. b. 5 (fifteenth-century Graduale from York, England) |
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Introit and Gradual for the Third Mass of Christmas (Day Mass), from Oxford, Bodleian Library, MS Lat. Liturg. b. 5 (fifteenth-century Graduale from York, England) |