Wilhelm Ackermann. Grundgedanken einer typenfreien Logik. Essays on the foundations of mathematics, dedicated to A. A. Fraenkelon his seventieth anniversary, edited by Y. Bar-Hillel, E. I. J. Poznanski, M. O. Rabin, and A. Robinson for The Hebrew University of Jerusalem, Magnes Press, Jerusalem 1961, and North-Holland Publishing Company, Amsterdam1962, pp. 143–155.

Ronald Harrop

doi:10.2307/2271679

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Wilhelm Ackermann. Grundgedanken einer typenfreien Logik. Essays on the foundations of mathematics, dedicated to A. A. Fraenkelon his seventieth anniversary, edited by Y. Bar-Hillel, E. I. J. Poznanski, M. O. Rabin, and A. Robinson for The Hebrew University of Jerusalem, Magnes Press, Jerusalem 1961, and North-Holland Publishing Company, Amsterdam1962, pp. 143–155.

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Wilhelm Ackermann. Grundgedanken einer typenfreien Logik. Essays on the foundations of mathematics, dedicated to A. A. Fraenkelon his seventieth anniversary, edited by Y. Bar-Hillel, E. I. J. Poznanski, M. O. Rabin, and A. Robinson for The Hebrew University of Jerusalem, Magnes Press, Jerusalem 1961, and North-Holland Publishing Company, Amsterdam1962, pp. 143–155.

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Wilhelm Ackermann. Grundgedanken einer typenfreien Logik. Essays on the foundations of mathematics, dedicated to A. A. Fraenkelon his seventieth anniversary, edited by Y. Bar-Hillel, E. I. J. Poznanski, M. O. Rabin, and A. Robinson for The Hebrew University of Jerusalem, Magnes Press, Jerusalem 1961, and North-Holland Publishing Company, Amsterdam1962, pp. 143–155.

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