A. B. · A. Boyd · Arnold L · B. L.
| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Study guide to accompany Barker The elements of logic | 978-0-07-003722-9 (0-07-003722-1) | 1980 |
| Study guide to accompany Barker The elements of logic | 978-0-07-037382-2 (0-07-037382-5) | 1974 |