| Author: | Doyle, Arthur Conan, 1859-1930 |
| Subject: | PR, Challenger, Professor (Fictitious character) -- Fiction, Fantasy fiction, South America -- Fiction, Prehistoric peoples -- Fiction, Dinosaurs -- Fiction |
| Format: | Electronic text |
| Date issued: | 2016 |
| Language: | Finnish |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | Kadonnut maailma [electronic resource] / Arthur Conan Doyle |