University of Isfahanacademics.ui.ac.ir/Dorsapax/userfiles/Sub16...Modern Logic Copi. l. Symbolic...
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University of Isfahanacademics.ui.ac.ir/Dorsapax/userfiles/Sub16...Modern Logic Copi. l. Symbolic Logie New York: Macmillan Pub. Fitch, F.B. v v). Symbolic Logic, An introduction