| Author: | Gernsback, Hugo, 1884-1967 |
| Subject: | PS, Science fiction |
| Format: | Text |
| Date issued: | 2019 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | Ralph 124C 41+ : A Romance of the Year 2660 [electronic resource] / Hugo Gernsback |