Letter (Astounding Stories of Super-Science, December 1930)
| First published | December 1930 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| December 1930 |
|
Astounding Stories of Super-Science, December 1930 | Reader's Guild | MAGAZINE | 423|423.2 |
| December 2009 | Astounding Stories of Super-Science, December 1930 | Project Gutenberg | Anthology | 423 | |
| March 2015 |
|
Astounding Stories of Super-Science, December 1930 | LibriVox | Anthology | |6 |