Columbia subject headings:
Radicalism--United States--History--20th century.
Subculture.
United States--Social conditions--1960-1980.
Harvard subject headings:
Radicalism--United States--History--20th century
Subculture--United States.
Subculture.
United States--Social conditions--1960-1980.
Princeton subject headings:
Radicalism--United States--History--20th century.
Subculture.
United States--Social conditions--1960-1980.