Columbia subject headings:
Gunn, Thom--Criticism and interpretation.
Hughes, Ted, 1930-1998--Criticism and interpretation.
Harvard subject headings:
Gunn, Thom--Criticism and interpretation.
Hughes, Ted, 1930-1998--Criticism and interpretation.
Princeton subject headings:
Gunn, Thom--Criticism and interpretation.
Hughes, Ted, 1930---Criticism and interpretation.