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Bacon Opus maius .tif Book Bacon Roger Opus maius apud Franciscum Pitteri Venetiis lat it Fratris Rogeri Bacon Opus majus ad Clementem pontificem maximum Primum Samuele Jebb Londini editum Nunc vero diligenter recusum Accedit Prologus Galeatus in reliqua opera ejusdem autoris Venetiis apud Franciscum Pitteri XL di tav ripiegate