| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| April 1939 |
|
Doc Savage, April 1939 | Street & Smith Publications, Inc. | MAGAZINE | 61 |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| April 1939 |
|
Doc Savage, April 1939 | Street & Smith Publications, Inc. | MAGAZINE | 61 |