| Comments | Helpful | |
|---|---|---|
| Clio-X: Cultural Heritage and Archives Ecosystem | 0 | 0% |
| Arhivi za škole (rus.) | 0 | 67% |
| Fabrike radnicima? / Factories to the Workers? | 0 | 67% |
| Office of the Historian | 0 | 0% |
| Konfesije u regionu | 0 | 75% |
| Societies under German Occupation | 0 | 100% |
| U.S. Holocaust Memorial Museum – Collections Search | 0 | 100% |
| Протоколи на Политбюро и на ЦК на БКП (1944–1989) | 0 | 0% |
| Ad fontes | 0 | 0% |
| Войните на България | 0 | 100% |