Columbia subject headings:
English poetry--20th century--Bio-bibliography.
English poetry--20th century--History and criticism.
Poets, English--20th century--Biography.
Harvard subject headings:
English poetry--20th century--Bio-bibliography--Dictionaries.
English poetry--20th century--Bio-bibliography.
English poetry--20th century--Dictionaries.
English poetry--20th century--History and criticism
English poetry--Irish authors--Bio-bibliography--Dictionaries.
English poetry--Irish authors--Dictionaries.
Poets, English--20th century--Biography
Poets, English--20th century--Biography--Dictionaries.
Poets, Irish--20th century--Biography--Dictionaries.
Reference works.
Princeton subject headings:
English poetry--20th century--Bio-bibliography.
English poetry--20th century--History and criticism.
Poets, English--20th century--Biography.