Columbia subject headings:
Harvard subject headings:
Holocaust, Jewish (1939-1945)--Historiography
World War, 1939-1945--Jews--Bulgaria.
World War, 1939-1945--Jews--Rescue--Bulgaria.
Princeton subject headings:
Holocaust, Jewish (1939-1945)--Historiography.
World War, 1939-1945--Jews--Bulgaria.
World War, 1939-1945--Jews--Rescue--Bulgaria.