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Cambridge (Mass.) 1968. 2 Bde.
Introduction to symbolic logic and its applications
New York 1958. 241 S.
Introduction to symbolic logic
Englewood Cliffs (N.J.) 1970. 252 S.
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Encino (Calif.) 1977. 179 S.
Modal logic. An introduction
London 1980. 295 S.
Introduction to mathematical logic
Princeton (N.J.) 1956. 376 S.
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A preface to logic
New York 1946. 209 S.
An introduction to logic and scientific method
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