Columbia subject headings:
Critics--Germany--Correspondence.
Mayer, Hans, 1907 March 19-2001--Correspondence.
Harvard subject headings:
Critics--Germany (West)--Correspondence.
Critics--Germany--Correspondence.
Mayer, Hans, 1907 Mar. 19---Correspondence.
Mayer, Hans, 1907 March 19-2001--Correspondence.
Princeton subject headings:
Mayer, Hans, 1907 March 19-2001--Correspondence.