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Oxford, Bodleian Library MS. Digby 218. 109 folios. Parchment. 13th and 14th Centuries. 3. Roger Bacon Opus Minus. f57.
13. [Two folios with diagrams from the Ars Notoria 'tercia figura grammatice', the first and second 'nota dyaletice', and 'prima figura artis rethorice'.]
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