Letter (Astounding Stories of Super-Science, January 1931)
| First published | January 1931 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| January 1931 |
|
Astounding Stories of Super-Science, January 1931 | Reader's Guild | MAGAZINE | 133|133.1 |
| October 2009 | Astounding Stories of Super-Science, January 1931 | Project Gutenberg | Anthology | 133 | |
| April 2015 |
|
Astounding Stories of Super-Science, January 1931 | LibriVox | Anthology | |6 |