| Author: | Knight, Damon, 1922-2002 |
| Subject: | PS, Science fiction, Short stories, Mars (Planet) -- Fiction, Extinct cities -- Fiction |
| Format: | Electronic text |
| Date issued: | 2020 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | Doorway to Kal-Jmar [electronic resource] / Damon Knight |