Cartoon: "Professor Snodgras, this assembly demands mathematical proof that you have conquered gravity."
| First published | March 1941 |
|---|---|
| Type | Interior Art |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| March 1941 |
|
Amazing Stories, March 1941 | Ziff-Davis Publishing Company | MAGAZINE | 6 |