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