| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| August 1937 |
|
Astounding Stories, August 1937 | Street & Smith Publications, Inc. | MAGAZINE | 8 |
| September 1937 |
|
Astounding Stories, September 1937 | Street & Smith Publications, Inc. | MAGAZINE | 132 |
| May 2000 | The Blue Spot and Entropy Reversed | Gryphon Books | Collection | 92 | |
| January 2015 |
|
Xandulu | Edizioni Della Vigna | Collection | |2 |