"The Challenge of the Expanding World"
| Series | The Brave And The Bold |
| Publisher | DC Comics |
| Type | Comic Book, Softcover |
| Language | English |
| Writer | Gardner Fox |
| Genre | Superhero |
| Characters | The Flash, The Atom |
Collected in 1
| Title | Number | Date | Format | |
|---|---|---|---|---|
 | "Master of Miracles" #406 | Vol. 1 #406 | 1971-09 | Softcover |