Su[m]ma de arithmetica geometria proportioni [et] proportionalita
Pacioli, Luca, approximately 1445-1517, Burndy Library, donor. DSI · [Venice : Paganinus de Paganinis] · leaf 520
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Mathematics · Arithmetic · Geometry · Ratio and proportion · Incunabula
Internet Archive · Smithsonian Libraries · Public domain. Free to use for anything.
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