| Author: | Fontenay, Charles L., 1917-2007 |
| Subject: | PS, Science fiction, Short stories, Regression (Civilization) -- Fiction, Technology -- Fiction |
| Format: | Electronic text |
| Date issued: | 2019 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | Conservation [electronic resource] / Charles L. Fontenay |