Columbia subject headings:
Bulgaria--Foreign relations--1878-1944--Sources.
Bulgaria--Politics and government--1878-1944--Sources.
Bŭlgarski zemedelski naroden sŭi︠u︡z--History--Sources.
Stamboliĭski, Aleksandŭr, 1879-1923--Correspondence.
Harvard subject headings:
Bulgaria--Foreign relations--1878-1944--Sources.
Bŭlgarski zemedelski naroden sŭi︠u︡z--History--Sources.
Stamboliĭski, Aleksandŭr, 1879-1923--Archives.
Princeton subject headings:
Bulgaria--Foreign relations--1878-1944--History--Sources.
Bulgaria--Politics and government--1878-1944--History--Sources.
Bŭlgarski zemedelski naroden sŭi︠u︡z--History--Sources.
Stamboliĭski, Aleksandŭr, 1879-1923--Correspondence.