Sher - Logical Consequence - New paperback or softback - X555z

Johnson - Teaching Thinking Skills - paperback or softback - X555z

Cunningham - Three Types of Logical Theory - New paperback or softback - X555z

Binder - Logical Writings of Karl Popper - New paperback or softback - X555z

Sion - A Fortiori Logic - New paperback or softback - X555z

Venn - Symbolic Logic - New paperback or softback - 55 - X555z

Mangiapane - Logical Conclusion - New paperback or softback - X555z

Lear - Aristotle and Logical Theory - New paperback or softback - X555z