Webb - Intro to Logic - New paperback or softback - X555z

Monk - Mathematical Logic - New paperback or softback - 89 - X555z

Baum - Logic Study Guide - New paperback or softback - X555z

Stamatellos - Introduction to Presocratics - New paperback or softback - X555z

Roper - Informal Logic - New paperback or softback - X555z

Jolicoeur - Introduction to Biometry - New paperback or softback - 87 - X555z

Barnes - Porphyry Introduction - New paperback or softback - X555z

Shoesmith - Multiple-Conclusion Logic - New paperback or softback - X555z