Columbia subject headings:
Christian sociology--United States--History--20th century.
Protestant churches--United States--History--20th century.
United States--Church history--20th century.
Harvard subject headings:
Christian sociology--United States--History--20th century.
Protestant churches--United States--History--20th century.
United States--Church history--20th century.
Princeton subject headings:
Christian sociology--United States--History--20th century.
Protestant churches--United States--History--20th century.
United States--Church history--20th century.