books.google.ca - A revised reprint of the Harcourt, Brace and Company edition of 1962. Written for independent study and suitable for an introductory course in logic, this classic text combines a sound presentation of logic with effective pedagogy and illustrates the role of logic in many areas of humanistic and scientific...http://books.google.ca/books/about/An_introduction_to_logic.html?id=U09MjwDSZ0kC&utm_source=gb-gplus-shareAn introduction to logic
