Columbia subject headings:
English literature--20th century--History and criticism.
English literature--Welsh authors--History and criticism.
Harvard subject headings:
English literature--20th century--History and criticism
English literature--Welsh authors--History and criticism
Princeton subject headings:
English literature--20th century--History and criticism.
English literature--Welsh authors--History and criticism.
Wales--In literature.
Wales--Intellectual life--20th century.