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The new immigration : a study of the industrial and social life of Southeastern Europeans in America. New York 1912
Roberts, Peter, (1970)
Osvoboditelni borbi na bŭlgarskoto naselenie v Makedonii︠a︡ i Odrinska Trakii︠a︡ sled Berlinskii︠a︡ kongres
Khristov, Khristo Angelov, (1981)
Macedonia : documents and material
Božinov, Vojn, (1978)