| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Speculation As a Fine Art and Thoughts on Life | 978-1-60796-265-6 (1-60796-265-9) | 2010 |
| Speculation As A Fine Art And Thoughts On Life | 978-1-4404-3497-6 (1-4404-3497-2) | 2008 |
| Speculation As a Fine Art and Thoughts on Life | 978-0-87034-056-7 (0-87034-056-5) | 1965 |
D G · D. G. Watts · D.W. · D Watts · G. W.
BN Publishing · CreateSpace Independent Publishing Platform · Fraser Publishing Co.