Letter (Astounding Stories of Super-Science, June 1930)
| First published | June 1930 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| June 1930 |
|
Astounding Stories of Super-Science, June 1930 | Publishers' Fiscal Corp | MAGAZINE | 424|424.3 |
| August 2009 | Astounding Stories of Super-Science, June 1930 | Project Gutenberg | Anthology | ||
| March 2014 |
|
Astounding Stories of Super-Science, June 1930 | LibriVox | Anthology | |7.1 |