Columbia subject headings:
Harvard subject headings:
American poetry--20th century--Indexes--Periodicals.
American poetry--20th century--Periodicals
American poetry--Bibliography--Periodicals.
American poetry--Societies, etc.--Directories.
Princeton subject headings:
American poetry--20th century--Indexes--Periodicals.
American poetry--20th century--Periodicals.
American poetry--Bibliography--Periodicals.
American poetry--Societies, etc.--Directories.
Periodicals.