They Changed the World: Leonardo Da Vinci
| First published | July 1939 |
|---|---|
| Type | Essay |
| Series | They Changed the World |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| July 1939 |
|
Startling Stories, July 1939 | Better Publications, Inc. | MAGAZINE | 94 |
| 2019 |
|
Startling Stories, July 1939 | Pulp Tales Press | Anthology | 94 |