John L. Chapman
Contributing Writer 3
| Title | Format | |
|---|---|---|
 | Cosmic Stories, March 1941 | Pulp Magazine |
 | Stirring Science Stories, February 1941 | Pulp Magazine |
 | Super Science Stories, January 1941 | Pulp Magazine |
| Title | Format | |
|---|---|---|
| Cosmic Stories, March 1941 | Pulp Magazine |
| Stirring Science Stories, February 1941 | Pulp Magazine |
| Super Science Stories, January 1941 | Pulp Magazine |