Books, Brochures, and Chapters>Book:  Taylor, Richard (1843), Sketch of the Analytical Engine invented by Charles Babbage Esq. By L. F. Menabrea, of Turin, Officer of the Military Engineers, Scientific Memoirs, Selections from The Transactions of Foreign Academies and Learned Societies and from Foreign Journals, Article XXIX, Vol III , London, Retrieved on 2009-11-30