Rudolf Carnap Frege Seminar Notes: Begriffsschrift/Logik in der Mathematik (Original), 1910-1913, Box 111a, Folder 2a, Papers of Rudolf Carnap, 1905-1970, ASP.1974.01, Special Collections Department, University of Pittsburgh Ditto Frege Se…

George Duke Dummett on Abstract Objects, Palgrave Macmillan, History of Analytic Philosophy Series, 2012 Pierre Wagner ed. Carnap's Ideal of Explication and Naturalism, Palgrave Macmillan, History of Analytic Philosophy Series, Due in Apri…