Columbia subject headings:
Becker, Werner--Correspondence.
Political science--Germany--History--20th century--Sources.
Political scientists--Germany--Correspondence.
Schmitt, Carl, 1888-1985--Correspondence.
Harvard subject headings:
Schmitt, Carl, 1888-1985.
Princeton subject headings:
Becker, Werner--Correspondence.
Political science--Germany--History--20th century--Sources.
Political scientists--Germany--Correspondence.
Schmitt, Carl, 1888-1985--Correspondence.