Columbia subject headings:
World War, 1939-1945--Bulgaria.
World War, 1939-1945--Peace.
World War, 1939-1945--Sources.
Harvard subject headings:
Bulgaria--Foreign relations--Treaties.
Peace treaties
World War, 1939-1945--Bulgaria--Peace.
World War, 1939-1945--Peace.
Princeton subject headings:
Bulgaria--Foreign relations--Treaties.
Peace treaties.
Treaties.
World War, 1939-1945--Bulgaria--Peace.
World War, 1939-1945--Peace.