Columbia subject headings:
American poetry--20th century.
Canadian poetry--20th century.
English poetry--20th century.
English poetry.
Rivers--Poetry.
Harvard subject headings:
American poetry--20th century
American poetry.
Canadian poetry--20th century
Canadian poetry.
English poetry--20th century
English poetry.
Rivers--Poetry.
Princeton subject headings:
American poetry--20th century.
Canadian poetry--20th century.
English poetry--20th century.
Poetry.
Rivers--Poetry.