(Lincoln): Department of Philosophy, University of Nebraska, 1950. 8vo. Wraps. 9 p. [40468]

Introduction by Karsten Harries. Translated by Lisa Harries. French portions translated by Joachim Neugroschel. New York: Paragon House, (1990). 8vo. Boards. xl, 319 p. 1st American edition. [103634]

Herausgegeben von Peter Gast. Leipzig: Insel Verlag, 1908. 12mo. Green cloth, stamped in gilt. T.e.g. xxv, 540 p. 1st ed. [53035]

Göttingen: Vandenhoeck & Ruprecht, (1968). 8vo. Wraps. 184 p. Moderne Mathematik in elementarer Darstellung 7. 1st ed. [70778]

No place: Thought, 1975. 6 3/4 x 10 in. Stapled sheets. 419-431 p. Offprint. [69075]

Berkeley: University of California Press, 1923. Wraps. (107)-132 p. Offprint (reprinted from University of California Publications in Philosophy, Volume 4). [27799]

No place: Revue International de Philosophie, 1966. 8vo. Wraps. [228]-248 p. Offprint. [70696]

Oxford: Clarendon Press, 1968. 8vo. Blue cloth, stamped in gilt. viii, 166 p. 1st edition. [87948]

Ed. by Georges Kalinowski. Bologna: Editrice CLUEB, (1986). 8vo. Boards. xxviii, 167 p. Instrumenta Rationis: Sources for the History of Logic in the Modern Age Volume III. [70795]

Cambridge: Cambridge University Press, (1980). 8vo. Wraps. vii, 279 p. [80188]

New York: Peter Eckler, 1889. 8vo. Brown cloth, stamped in blind. iv, 108, 16 p. [87191]

New York: Harcourt, Brace, 1927. 8vo. Green cloth, stamped in gilt & blind. viii, 408 p. 1st American edition (from the British sheets). [87400]