| Author: | Hamilton, Edmond, 1904-1977 |
| Subject: | PS, Science fiction, Short stories, Education -- Fiction, Inventions -- Fiction |
| Format: | Electronic text |
| Date issued: | 2022 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | The knowledge machine [electronic resource] / Edmond Hamilton |