Columbia subject headings:
Authors, Swedish--20th century--Correspondence.
Composers--Finland--Correspondence.
Paul, Adolf--Correspondence.
Sibelius, Jean, 1865-1957--Correspondence.
Harvard subject headings:
Authors, Swedish--20th century--Correspondence
Composers--Finland--Correspondence.
Paul, Adolf--Correspondence.
Sibelius, Jean, 1865-1957--Correspondence.
Princeton subject headings: