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"Robert Recorde's Mathematical Teaching and the anti-Aristotelian Movement" "Robert Seeley… the Restless Frontiersman" Robert T. Gunther and the Old Ashmolean Robert T. Gunther: A Pioneer in the History of Science 1869-1940 Robert Wilhelm Bunsen Rocenka Technickeho Muzea v Kosiciach, 1968 Roentgen Rays and Phenomena of the Anode and Cathode "Roger Bacon and the Voynich Manuscript" "Roger Bacon" Roger Bacon: Essays Contributed by Various Writers on the Occasion of the Commemoration of the Seventh Centenary of his Birth "Roger Bacon's Gunpowder and His Secret Wisdom" 'Roger Barlow: A New Chapter in Early Tudor Geography' Roger Fenton: The First Secretary of The Royal Photographic Society Roger Joseph Boscovich S. J., F.R.S., 1711-1787: Studies of his Life and Work on the 250th Anniversary of his Birth "Roger Sherman's Field Survey Book: Richard Norwood's Epitome" "Role of the Intellectual in Public Bureaucracy" Rolfe Family Records : 2 entries Roll of commissioned officers in the Medical service of the British army: who served on full pay within the period between the accession of George II and the formation of the Royal army medical corps, 20 June 1727 to 23 June 1898, with an introduction sho Roman and Islamic Water-Lifting Wheels Roman Science
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