Columbia subject headings:
Bulgaria--Foreign relations--1878-1944.
Prime ministers--Bulgaria--Diaries.
Radoslavov, Vasil, 1854-1929--Diaries.
World War, 1914-1918--Bulgaria.
World War, 1914-1918--Foreign relations.
Harvard subject headings:
World War, 1914-1918--Bulgaria
Princeton subject headings:
Bulgaria--Foreign relations--1878-1944.
Prime ministers--Bulgaria--Diaries.
Radoslavov, Vasil, 1854-1929--Diaries.
World War, 1914-1918--Bulgaria.
World War, 1914-1918--Diplomatic history.