| Original Language | English |
| First published | 1939-06 |
| Links | http://www.isfdb.org/cgi-bin/title.cgi?189591 |
| Notes | "The Ultimate Catalyst" is a short story by John Taine, first published in Thrilling Wonder Stories, June 1939. |
Editions 1
Add Edition| Title | Publisher | Format | Language | Location | Dates | Impression | |
|---|---|---|---|---|---|---|---|
 | Thrilling Wonder Stories, June 1939 | Better Publications, Inc. | Pulp Magazine | English | New York, NY | 1939 |