Columbia subject headings:
Energy policy--United States--Congresses.
Medical policy--United States--Congresses.
United States--Emigration and immigration--Congresses.
United States--Social policy--Congresses.
Harvard subject headings:
Energy policy--United States--Congresses
Medical policy--United States--Congresses
United States--Emigration and immigration--Congresses.
United States--Social conditions--1960-1980.
United States--Social policy--Congresses.
United States--Social policy.
Princeton subject headings:
Energy policy--United States--Congresses.
Medical policy--United States--Congresses.
United States--Emigration and immigration--Congresses.
United States--Social policy--Congresses.