Columbia subject headings:
Thomas, R. S. (Ronald Stuart), 1913-2000. Poetry.
Harvard subject headings:
Thomas, R. S. (Ronald Stuart), 1913-2000--Criticism and interpretation.
Thomas, R. S. (Ronald Stuart), 1913-2000. Poetry.
Princeton subject headings:
Thomas, R. S. (Ronald Stuart), 1913-2000--Criticism and interpretation.