The Opus Majus of Roger Bacon : Robert Belle burke : Free Download, Borrow, and Streaming : Internet Archive
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Perspectiva. . . Nunc primum in lucem edita opera. . . lohannis Combachii | Roger BACON | 1st Edition
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The "opus Majus" of Roger Bacon, Vol. 1 (Classic Reprint): Bacon, Roger: 9780260743817: Books - Amazon.ca
![Perspectiva. . . Nunc primum in lucem edita opera. . . lohannis Combachii | Roger BACON | 1st Edition Perspectiva. . . Nunc primum in lucem edita opera. . . lohannis Combachii | Roger BACON | 1st Edition](https://www.milestone-books.de/pictures/medium/002782_01.jpg)