| Author: | Keith, Donald, 1930-1985 |
| Subject: | PS, Science fiction, Short stories, Time travel -- Fiction, Kidnapping -- Fiction, Engineers -- Fiction, Spouses -- Fiction |
| Format: | Electronic text |
| Date issued: | 2016 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | Butterfly 9 [electronic resource] / Donald Keith |