| Author: | Tonelli, Sándor, 1882-1950 |
| Subject: | CB, Civilization |
| Format: | Electronic text |
| Date issued: | 2023 |
| Language: | Hungarian |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | Emberi problémák [electronic resource] / Sándor Tonelli |