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Cohen M. R. . N. E., . (1934). An Introduction to Logic and Scientific Method. : Harcourt Brace And Comp.
Cohen Morris R Nagel Ernest, . 1934. An Introduction to Logic and Scientific Method. : Harcourt Brace And Comp.
Cohen Morris R Nagel Ernest, . An Introduction to Logic and Scientific Method. : Harcourt Brace And Comp. 1934.
