| Author: | Lang, Allen Kim, 1928-2009 |
| Subject: | PS, Science fiction, Short stories, Mars (Planet) -- Fiction, Trials -- Fiction |
| Format: | Electronic text |
| Date issued: | 2021 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | Machine of Klamugra [electronic resource] / Allen Kim Lang |