A numbered version of Regola Rubertina for easy reference.Regola Rubertina (1542) is the only publication by Ganassi that originally includes page numbers (from I–L, 1–50). The 70-pages long Lettione seconda (1543) is unnumbered, and so is Fontegara (1535) with 158 pages, which makes it very difficult to reference a specific page or to quote a passage from them.More info at https://fontegara.com/projects/numbering-ganassis-works