For Your Information: Earth Tunnels
| First published | October 1953 |
|---|---|
| Type | Essay |
| Series | For Your Information |
Publications (2)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| October 1953 | Galaxy Science Fiction, October 1953 | Galaxy Publishing Corporation | MAGAZINE | 80 |
| March 1954 | Galaxy Science Fiction, Vol. 3 No. 12 | Strato Publications | MAGAZINE | 67 |