Columbia subject headings:
Secularism--United States--History--20th century--Congresses.
United States--Religion--1960---Congresses.
Harvard subject headings:
Secularism--United States--History--20th century--Congresses.
United States--Religion--1960---Congresses.
Princeton subject headings:
Secularism--United States--History--20th century--Congresses.
United States--Religion--1960---Congresses.