Columbia subject headings:
Debts, Public--Bulgaria.
Finance--Bulgaria.
World War, 1914-1918--Finance--Bulgaria.
Harvard subject headings:
Debts, Public--Bulgaria.
Finance--Bulgaria
World War, 1914-1918--Finance--Bulgaria.
Princeton subject headings:
Debts, Public--Bulgaria.
Finance--Bulgaria.
World War, 1914-1918--Finance--Bulgaria.