Columbia subject headings:
Harvard subject headings:
Artin, Emil, 1898-1962--Correspondence.
Hasse, Helmut, 1898-1979--Correspondence.
Mathematicians--Austria--Correspondence.
Mathematicians--Europe, German-speaking--Biography.
Mathematicians--Germany--Correspondence.
Princeton subject headings:
Artin, Emil, 1898-1962--Correspondence.
Hasse, Helmut, 1898-1979--Correspondence.
Mathematicians--Austria--Correspondence.
Mathematicians--Europe, German-speaking--Biography.
Mathematicians--Germany--Correspondence.