| Author: | Del Rey, Lester, 1915-1993 |
| Subject: | PS, Science fiction, Short stories, Extraterrestrial beings -- Fiction, Human-alien encounters -- Fiction |
| Format: | Electronic text |
| Date issued: | 2020 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | The Course of Logic [electronic resource] / Lester Del Rey |