| September 1957 |
|
Fantastic Universe, September 1957
|
King-Size Publications, Inc. |
MAGAZINE |
61 |
| March 2009 |
|
The Helpful Robots
|
Project Gutenberg |
Chapbook |
|
| July 2009 |
|
Short Science Fiction Collection 21
|
LibriVox |
Anthology |
|5 |
| July 2013 |
|
Anthology of Sci-Fi V32: The Pulp Writers
|
Spastic Cat Press |
Anthology |
|
| July 2016 |
|
Fantastic Stories Presents the Fantastic Universe Super Pack
|
Positronic Publishing |
Anthology |
|6 |
| August 2016 |
|
Fantastic Stories Presents the Fantastic Universe Super Pack #3
|
Positronic Publishing |
Anthology |
103 |
| September 2016 |
|
Fantastic Stories Presents the Fantastic Universe Super Pack
|
Positronic Publishing |
Anthology |
|6 |
| September 2016 |
|
Fantastic Stories Presents the Fantastic Universe Super Pack #3
|
Positronic Publishing |
Anthology |
|10 |
| April 2018 |
|
Fantastic Stories Presents the Fantastic Universe Super Pack
|
Positronic Publishing |
Anthology |
|6 |
| April 2018 |
|
Fantastic Stories Presents the Fantastic Universe Super Pack #3
|
Positronic Publishing |
Anthology |
103 |