Columbia subject headings:
American literature--20th century--History and criticism.
Books and reading--Social aspects--United States--History--20th century.
Literature and society--United States--History--20th century.
Social problems--United States--History--20th century.
Harvard subject headings:
American literature--20th century--History and criticism
Books and reading--Social aspects--United States--History--20th century.
Literature and society--United States--History--20th century.
Social problems--United States--History--20th century.
Princeton subject headings:
American literature--20th century--History and criticism.
Books and reading--Social aspects--United States--History--20th century.
Literature and society--United States--History--20th century.
Social problems--United States--History--20th century.