Mezhdusŭi︠u︡znishka Trakii︠a︡. - Altŭnov, Ivan. (Sofii︠a︡, Pridvorna pechatnit︠s︡a akt︠s︡ionerno druzhestvo, 1921)
At head of title: Sŭi︠u︡z na Bŭlgarskiti︠e︡ ucheni, pisateli i khudozhnit︠s︡i.
Mode of access: Internet.
Keywords: World War, 1914-1918 -- Territorial questions -- Thrace; Thrace