An Introduction to Combinatory Analysis (Classic Reprint)

Introduction to Logic Informal Fallacies by Jason Lisle Masterbooks Paperback

Introduction to Higher Algebra (Classic Reprint),

An Introduction to Celestial Mechanics (Classic Reprint)

Introduction to Medieval Logic

Introduction to Logic and the Methodology of Deductive Sciences by Alfred Tarski

Introduction to Logic Informal Fallacies by Jason Lisle Masterbooks Paperback

Introduction to Logic by Carl Cohen and Irving M. Copi (1997, Hardcover)