Columbia subject headings:
Harvard subject headings:
Book selection--History--20th century.
Books and reading--United States--History--20th century
Fiction in libraries--History--20th century.
Fiction in libraries--United States--History--20th century.
Public libraries--Book selection--United States--History--20th century.
Public libraries--United States--History--20th century.
Princeton subject headings:
Book selection--History--20th century.
Books and reading--United States--History--20th century.
Fiction in libraries--History--20th century.
Public libraries--United States--History--20th century.