Columbia subject headings:
Authors, American--20th century--Correspondence.
Dahlberg, Edward, 1900-1977--Correspondence.
Olson, Charles, 1910-1970--Correspondence.
Poets, American--20th century--Correspondence.
Harvard subject headings:
Authors, American--20th century--Correspondence
Dahlberg, Edward, 1900-1977--Correspondence.
Olson, Charles, 1910-1970--Correspondence.
Poets, American--20th century--Correspondence
Princeton subject headings:
Authors, American--20th century--Correspondence.
Dahlberg, Edward, 1900-1977--Correspondence.
Olson, Charles, 1910-1970. Correspondence.
Poets, American--20th century--Correspondence.