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Gloriaanonymous SourcesPoznan: Biblioteka Zakladu Muzykologii Uniwersytetu Poznanskiego, MS without shelfmark, number 1 (2/1) (recto).LiteratureLEFFERTS, Peter M. The Motet in England in the Fourteenth Century, Ann Arbor: UMI Research Press, 1986, pp. 86, 331/n89.   | 
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