Columbia subject headings:
Campbell, Donald, 1940---Criticism and interpretation.
Glen, Duncan, 1933-2008--Criticism and interpretation.
Scottish poetry--20th century--History and criticism.
Harvard subject headings:
Campbell, Donald, 1940---Criticism and interpretation.
English poetry--20th century--History and criticism
English poetry--Scottish authors--History and criticism
Glen, Duncan, 1933---Criticism and interpretation.
Princeton subject headings: