| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Human Kingdom: A Study of the Nature and Destiny of Man in the Light of Today's Knowledge | 978-0-87668-499-3 (0-87668-499-1) | 1983 |
| The Human Kingdom: A Study of the Nature and Destiny of Man in the Light of Today's Knowledge | 978-0-87668-731-4 (0-87668-731-1) | 1977 |