Columbia subject headings:
Composers--Germany--Correspondence.
Reger, Max, 1873-1916.
Stein, Fritz Wilhelm, 1879-1961.
Harvard subject headings:
Composers--Germany--Correspondence
Reger, Max, 1873-1916--Correspondence.
Stein, Fritz Wilhelm, 1879-1961--Correspondence.
Princeton subject headings:
Composers--Germany--Correspondence.
Reger, Max, 1873-1916.
Stein, Fritz Wilhelm, 1879-1961.