Columbia subject headings:
Harvard subject headings:
Class field theory--History.
Hasse, Helmut, 1898-1979--Correspondence.
Mathematicians--Germany--Correspondence.
Noether, Emmy, 1882-1935--Correspondence.
Princeton subject headings:
Algebraic number theory.
Hasse, Helmut, 1898-1979--Correspondence.
Mathematicians--Biography.
Noether, Emmy, 1882-1935--Correspondence.