| Author: | Spencer, Herbert, 1820-1903 |
| Subject: | B, Philosophy and religion, Evolution, Knowledge, Theory of |
| Format: | Text |
| Date issued: | 2017 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | First Principles [electronic resource] / Herbert Spencer |