| Comments | Helpful | |
|---|---|---|
| SUDigital – СУ Св.Климент Охридски | 0 | 0% |
| Western Civilization Webography | 0 | 0% |
| Апорт-Каталог | 0 | 0% |
| Zotero: The Next-Generation Research Tool | 0 | 0% |
| Children and Youth in History | 0 | 50% |
| E-Zeitschriftenbibliothek –Geschichte | 0 | 0% |
| Dmoz – Society: History | 0 | 100% |
| Internet Archive | 0 | 100% |
| Computers and Audiovisual Resources in History | 0 | 0% |
| Intute: Arts and Humanities-History | 0 | 0% |