Opus Majus, Volumes 1 and 2
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The mirror of alchemy
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The Root of the World and the...
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Roger Bacon's Letter:...
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The Cure of Old Age, and...
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The Alchemy Method
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On Signs (Opus Maius, Part 3,...
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Roger Bacon's Selected Occult...
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The 'Opus majus' of Roger...
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The Mirror of Alchemy...
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The Letter of Roger Bacon...
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Roger Bacon's Letter
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The "opus Majus" of Roger...
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Moral Philosophy
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The 'Opus Majus' of Roger...
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Four Works of Roger Bacon
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Roger Bacon's Life and Work
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Roger Bacon's Philosophy of...
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Roger Bacons Philosophy of...
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Optical Science
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Opera Hactenus Inedita Rogeri...
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The Mirror of Alchimy ...
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The "Opus Majus" of Roger...
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de Nigromancia
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