Columbia subject headings:
Eckhardt, Karl August, 1901-1979.
Law, Germanic--Sources--Indexes.
Law, Medieval--Germany--Sources--Indexes.
Harvard subject headings:
Eckhardt, Karl August, 1901-
Law, Germanic--Sources--Indexes.
Law--Germany--Sources--Indexes.
Princeton subject headings:
Eckhardt, Karl August, 1901-1979.
Law, Germanic--Sources--Indexes.
Law--Germany--History--Sources--Indexes.