By Newton, Isaac,. Madrid : Consejo Superior de Investigaciones Científicas, 2013 . 1 online resource (628 pages) : , "This work ... is contained in the largest section of a lengthy manuscript from the Yahuda collection at the National Library of Israel, Jerusalem (Yahuda Ms. 19, ff. 1-143), and complemented with a shorter one from the same collection (Yahuda Ms. 12); the beginning of the work is written in the final pages of a third manuscript (Yahuda Ms. 1.5, ff. 78-85)"--P. [19].

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