Originally published in Chemical and Engineering News, August 13, 1956; 3882-3886
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| April 1957 |
|
The Magazine of Fantasy and Science Fiction, April 1957 | Fantasy House, Inc. | MAGAZINE | 42 |
| 1967 | Is Anyone There? | Doubleday | Nonfiction |