Available on page 7, <a target="_blank" rel="noopener" href="http://www.isfdb.org/cgi-bin/pl.cgi?GRSBCKYR1999">Bleiler (Gernsback)</a>.
First published in Science and Invention, April 1922. Amazing Stories Quarterly, Fall 1928, illustrated Frank R. Paul.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| April 1922 |
|
Science and Invention, April 1922 | Experimenter Publishing Company | MAGAZINE | 1115 |
| October 1928 |
|
Amazing Stories Quarterly, Fall 1928 | Experimenter Publishing Company | MAGAZINE | 564 |