Carnap, Rudolf
Introduction to symbolic logic and its
Dover Publications, 1958
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Standley, Gerald B.
New methods in symbolic logic
Houghton Mifflin, 1971
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Langer, Susanne K.
An introduction to symbolic logic
Dover, 1967
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Chang, Chin-Liang
Symbolic logic and mechanical theorem proving
Academic Press, 1973
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Dalen, Dirk van
Logic and structure
Springer-Verlag, 1994
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