[Opera]
Boethius, -524, Gregori, Gregorio de', active 1480-1528, printer, Gregori, Giovanni de', active 15th century, printer, Bates, Joshua, 1788-1864, former owner · [Venice: Giovanni and Gregorio de' Gregori, 1492] · 34 pictures
Arithmetic · Music theory
Internet Archive · Boston Public Library · Public Domain Mark 1.0
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