Columbia subject headings:
Brain drain--Germany--History--20th century.
Germans--Foreign countries.
Germany--Emigration and immigration.
Germany--Intellectual life--20th century.
Intellectuals--Germany--History--20th century.
Harvard subject headings:
Brain drain--Germany--History--20th century.
Germans--Foreign countries
Germany--Emigration and immigration.
Germany--Intellectual life--20th century.
Intellectuals--Germany--History--20th century.
Princeton subject headings:
Germans--Foreign countries--History--20th century.
Germany--Emigration and immigration--History--1933-1945.
Political refugees--Germany--History--20th century.