Columbia subject headings:
Harvard subject headings:
Historians--Biography--20th century.
Iggers, Georg G.
Iggers, Wilma.
Intellectuals--Biography--20th century.
Refugees--Europe, Central--Biography.
World War, 1939-1945--Refugees.
Princeton subject headings:
Historians--Biography--20th century.
Iggers, Georg G.
Iggers, Wilma.