Bombelli (Rafael): L'Algebra Opera, Bologna, per Giovanni Rossi, 1579, 8vo, second edition, publisher's device of Perseus on title, woodcut diagrams (title with ownership inscription of Anton. Bertol, title and following leaf waterstained), 18th-century half calf (spine worn at extremities) [Riccardi I, 146: 'quest' opera è meritamente noverata fra le più preziose per la storico dell'algebra'; Brunet I, 1081]