Columbia subject headings:
Composers--Correspondence.
Kandinsky, Wassily, 1866-1944.
Painters--Soviet Union--Correspondence.
Schoenberg, Arnold, 1874-1951.
Harvard subject headings:
Artists--Soviet Union--Biography.
Arts, Modern--20th century
Biographies.
Composers--Germany--Biography
Kandinsky, Wassily, 1866-1944
Schoenberg, Arnold, 1874-1951
Schoenberg, Arnold, 1874-1951--Contributions in art.
Princeton subject headings:
Composers--Correspondence.
Kandinsky, Wassily, 1866-1944.
Painters--Soviet Union--Correspondence.
Schoenberg, Arnold, 1874-1951.