| Author: | Upton, George P. (George Putnam), 1834-1919 |
| Subject: | DD, Frederick I, Holy Roman Emperor, approximately 1123-1190, Germany -- History -- Frederick I, 1152-1190 |
| Format: | Text |
| Date issued: | 2021 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | Barbarossa [electronic resource] / George P. Upton |