Columbia subject headings:
Church and state--United States--History--20th century.
Conservatism--United States--History--20th century.
Freedom of religion--United States--History--20th century.
Presidents--United States--Religion.
United States--Church history--20th century.
Harvard subject headings:
Church and state--United States--History--20th century
Conservatism--United States--History--20th century
Freedom of religion--United States--History--20th century.
Presidents--United States--Religion
United States--Church history--20th century.
Princeton subject headings:
Church and state--United States--History--20th century.
Conservatism--United States--History--20th century.
Freedom of religion--United States--History--20th century.
Presidents--United States--Religion.
United States--Church history--20th century.