Boethius, Arithmetica geometria et musica Boetii. Venice: Giovanni and Gregorio de’ Gregori, 1492. (sig. 2l8r)
Boston Public Library, Q.403.7 (public domain)
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Boethius, Arithmetica geometria et musica Boetii. Venice: Giovanni and Gregorio de’ Gregori, 1492. (sig. 2l8r)
Boston Public Library, Q.403.7 (public domain)