Introductory Logic PHI 120 Presentation: "Truth Tables – Validity vs. Soundness" This PowerPoint Presentation contains a large number of slides, a good. - ppt download
Review of Logic Primer, 2nd edition, by Colin Allen and Michael Hand - Michael Goodman - Essays in Philosophy (Philosophy Documentation Center)
Logic Primer, third edition: Allen, Colin, Hand, Michael: 9780262543644: Amazon.com: Books