| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| April 1964 |
|
Galaxy Magazine, April 1964 | Galaxy Publishing Corporation | MAGAZINE | 133 |
| November 1978 |
|
Imperi galattici: l'epica fantascientifica 1923-1978 | Fanucci Editore | Omnibus | 471 |