Columbia subject headings:
Critical theory--United States--History--20th century.
Frankfurt school of sociology--United States--History.
Philosophy--United States--History--20th century.
Harvard subject headings:
Critical theory--United States--History--20th century.
Frankfurt school of sociology--United States--History.
Philosophy--United States--History--20th century.
Princeton subject headings:
Critical theory--United States--History--20th century.
Frankfurt school of sociology--United States--History.
Philosophy--United States--History--20th century.