Bulgarsko istorichesko druzhestvo,
105
Българско историческо дружество,
105
Institute for Historical Studies at the Bulgarian Academy of Sciences,
53
Türk Tarih Kurumu,
39
[yayl.y.],
17
National Archives (USA),
10
Trakya Üniversitesi,
10
Universitetska pechatnitsa,
10
Universitetsko Izdatelstvo “Sv. Kliment Ohridski“
10
2018.
8
285 Yayıncı daha
