| Author: | Blackmar, Frank W. (Frank Wilson), 1854-1931 |
| Subject: | HM, Sociology, Progress, Civilization |
| Format: | Electronic text |
| Date issued: | 2009 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | History of Human Society [electronic resource] / Frank W. Blackmar |