Columbia subject headings:
United States--Economic conditions--1981-2001.
United States--Social conditions--1980-2020.
Waste (Economics)--United States.
Harvard subject headings:
United States--Economic conditions--1981-2001.
United States--Social conditions--1980-2020
Waste (Economics)--United States.
Princeton subject headings:
United States--Economic conditions--1981-2001.
United States--Social conditions--1980-2020.
Waste (Economics)--United States.