Columbia subject headings:
United States--Church history--20th century.
United States--Religion--1901-1945.
United States--Religion--1945-
Harvard subject headings:
United States--Church history--20th century.
United States--Religion--1901-1945.
United States--Religion--1945-
Princeton subject headings:
United States--Church history--20th century.
United States--Religion--1901-1945.
United States--Religion--1945-