Columbia subject headings:
Bulgaria--History--1941-1944--Sources.
Jews--Bulgaria--History--Sources.
World War, 1939-1945--Jews--Sources.
Harvard subject headings:
Bulgaria--History--1941-1944--Sources.
Jews--Bulgaria--History--Sources.
World War, 1939-1945--Jews--Bulgaria--Sources.
Princeton subject headings:
Bulgaria--History--1941-1944--Sources.
Jews--Bulgaria--History--Sources.
World War, 1939-1945--Jews--Bulgaria--Sources.