Eike-Henner W. Kluge. Introduction. On the foundations of geometry and formal theories of arithmetic, by Gottlob Frege, translated and with an introduction by Eike-Henner W. Kluge, Yale University Press, New Haven and London1971, pp. xi–xlii. - Gottlob Frege. Letter from G. Frege to Heinrich Liebmann. On the foundations of geometry and formal theories of arithmetic, by Gottlob Frege, translated and with an introduction by Eike-Henner W. Kluge, Yale University Press, New Haven and London1971, pp. 3–5. (English translation of pp. 404–406 of Gottlob Frege, Kleine Schriften, edited by Ignacio Angelelli, Georg Olms Verlagsbuchhandlung, Hildesheim 1967. Cf. VII 92.) - Gottlob Frege and David Hilbert. Correspondence leading to “On the foundations of geometry,” On the foundations of geometry and formal theories of arithmetic, by Gottlob Frege, translated and with an introduction by Eike-Henner W. Kluge, Yale University Press, New Haven and London1971, pp. 6–21. (English translation of pp. 407-418 of the same.) - Gottlob Frege. On the foundations of geometry. English translation of 4916.1. On the foundations of geometry and formal theories of arithmetic, by Gottlob Frege, translated and with an introduction by Eike-Henner W. Kluge, Yale University Press, New Haven and London1971, pp. 22–37. - A. Korselt. On the foundations of geometry. English translation of 913. On the foundations of geometry and formal theories of arithmetic, by Gottlob Frege, translated and with an introduction by Eike-Henner W. Kluge, Yale University Press, New Haven and London1971, pp. 38–48. - Gottlob Frege. On the foundations of geometry. English translation of 4918. On the foundations of geometry and formal theories of arithmetic, by Gottlob Frege, translated and with an introduction by Eike-Henner W. Kluge, Yale University Press, New Haven and London1971, pp. 49–112. - J. Thomae. Thoughtless thinkers: A holiday chat. English translation of 1521. On the foundations of geometry and formal theories of arithmetic, by Gottlob Frege, translated and with an introduction by Eike-Henner W. Kluge, Yale University Press, New Haven and London1971, pp. 115–120. - Gottlob Frege. Reply to Mr. Thomae's holiday chat. English translation of 4919. On the foundations of geometry and formal theories of arithmetic, by Gottlob Frege, translated and with an introduction by Eike-Henner W. Kluge, Yale University Press, New Haven and London1971, pp. 121–127. - J. Thomae. Explanation. English translation of 1522. On the foundations of geometry and formal theories of arithmetic, by Gottlob Frege, translated and with an introduction by Eike-Henner W. Kluge, Yale University Press, New Haven and London1971, pp. 128–131. - Gottlob Frege. Renewed proof of the impossibility of Thomae's formal arithmetic and Concluding remarks. English translation of 4920. On the foundations of geometry and formal theories of arithmetic, by Gottlob Frege, translated and with an introduction by Eike-Henner W. Kluge, Yale University Press, New Haven and London1971, pp. 132–138. - Gottlob Frege. On formal theories of arithmetic. English translation of 496. On the foundations of geometry and formal theories of arithmetic, by Gottlob Frege, translated and with an introduction by Eike-Henner W. Kluge, Yale University Press, New Haven and London1971, pp. 141–153.