Holding Institutions
- T︠S︡entralen dŭrzhaven arkhiv (Bulgaria)42
- United States Holocaust Memorial Museum12
- Aleksandar Mosci1
- Archivio Apostolico Vaticano1
- Archiwum Akt Nowych1
- Bulgaria. Ministerstvo na vu̐treshniti︠e︡ raboti i narodnoto zdrave1
- Državen arhiv na Republika Makedonija1
- Dŭrzhaven arkhiv--Blagoevgrad1
- Dŭrzhaven arkhiv--Burgas1
- Dŭrzhaven arkhiv--Kustendil1
- Dŭrzhaven arkhiv--Montana1
- Dŭrzhaven arkhiv--Pazardzhik1
- Dŭrzhaven arkhiv--Vratsa1
- Dŭrzhaven arkhiv--Plovdiv1
- Romania. Ministerul Afacerilor Externe1
- Shomer ha-tsaʻir (Organization : Israel). Merkaz tiʻud ṿa-ḥeḳer1
- Sofiĭski universitet "Sv. Kliment Okhridski." Universitetska biblioteka1
- T︠S︡entralen voenen arkhiv1
- United Nations Archives and Records Management Section1