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C. C. Chang. Logic with positive and negative truth values. Proceedings of a Colloquium on Modal and Many-valued Logics, Helsinki, 23–26 August, 1962, Acta philosophica Fennica, no. 16, Helsinki1963, pp. 19–39.
Published online by Cambridge University Press: 12 March 2014
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- Copyright © Association for Symbolic Logic 1971