Foreword: Four Themes for Four Futures
| First published | October 1971 |
|---|---|
| Type | Essay |
| Series | Asimov's Essays: Others' Work |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| October 1971 |
|
Four Futures | Hawthorn Books | Anthology | ix |
| October 1976 |
|
Four Futures | Manor Books | Anthology | ix |