Columbia subject headings:
Haight-Ashbury (San Francisco, Calif.)--Social conditions.
Hippies--California--San Francisco--History.
San Francisco (Calif.)--Social conditions.
Harvard subject headings:
Haight-Ashbury (San Francisco, Calif.)--Social conditions.
Hippies--California--San Francisco--History.
San Francisco (Calif.)--Social conditions.
Princeton subject headings: