Columbia subject headings:
Harvard subject headings:
Authors--20th century--Correspondence.
Authors--21st century--Correspondence.
Literature, Modern--20th century--History and criticism
Literature, Modern--21st century--History and criticism
Princeton subject headings:
Authors--20th century--Correspondence.
Authors--21st century--Correspondence.
Literature, Modern--20th century--History and criticism.
Literature, Modern--21st century--History and criticism.