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[untexted work: GB-Lbl 29987 89v]anonymous SourcesLondon: British Library, Additional 29987, fol. 88v (2/0).FacsimilesThe Manuscript London, British Museum Add. 29987, facsimile edition by Gilbert Reaney, [n.p.]: American Institute of Musicology, 1965. Musicological Studies and Documents 13.   | 
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