An Introduction to Symbolic Logic by Langer, Susanne K. 1953

Introduction to Programmable Logic Controllers, 3rd Edition

Introduction to Logic by Irving M. Copi - 1968 Hardcover Vintage - 3rd Edition

Introduction to Programmable Logic Controllers, 3rd Edition by Gary Dunning

Introduction to Programmable Logic Controllers, 3rd Edition - ACCEPTABLE

Introduction to Programmable Logic Controllers, 3rd Edition

An Introduction to Symbolic Logic by Langer, Susanne K.

An Introduction to Philosophical Logic by Anthony C. Grayling 3rd edition