Columbia subject headings:
Brain drain--Germany--History--20th century.
Germans--Foreign countries--Intellectual life--20th century.
Germany--Emigration and immigration--History--20th century.
Intellectuals--Germany--History--20th century.
Harvard subject headings:
Brain drain--Germany--History--20th century.
Germans--Foreign countries
Germans--Foreign countries--Intellectual life--20th century.
Germany--Emigration and immigration--History--20th century.
Intellectuals--Germany--History--20th century.
Political scientists--Germany--Biography
Söllner, Alfons--Bibliography.
Princeton subject headings:
Brain drain--Germany--History--20th century.
Germans--Foreign countries--Intellectual life--20th century.
Germany--Emigration and immigration--History--20th century.
Intellectuals--Germany--History--20th century.