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Frederic B. Fitch. A simplification of basic logic. The journal of symbolic logic, vol. 18 (1953), pp. 317–325. - Frederic B. Fitch. A definition of negation in extended basic logic. The journal of symbolic logic, vol. 19 (1954), pp. 29–36. See Errata, ibid., p. vi.
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Frederic B. Fitch. A simplification of basic logic. The journal of symbolic logic, vol. 18 (1953), pp. 317–325.
Frederic B. Fitch. A definition of negation in extended basic logic. The journal of symbolic logic, vol. 19 (1954), pp. 29–36. See Errata, ibid., p. vi.
Published online by Cambridge University Press: 12 March 2014
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- Copyright © Association for Symbolic Logic 1955