Steel-Age Rockhounds
| First published | January 1951 |
|---|---|
| Type | Essay |
Publications (2)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| January 1951 | Amazing Stories, January 1951 | Ziff-Davis Publishing Company | MAGAZINE | 87 |
| May 1952 | Amazing Stories, #11 | Thorpe & Porter | MAGAZINE | 87 |