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DIATESSARON, διὰ τεσσάρων, Musicis Quarta, quæ duobus tonis
constat et dimidio majori, Gall. Quarte. Vide Diapason.
les Bénédictins de St. Maur, 1733–1736.
Diatessaronice, Secundum Quartam Musicorum. Dum Gloria in excelsis Diatessaronice intenderetur, in Actis SS. Gervasii et Protasii Junii tom. 3. pag. 835. A.