Columbia subject headings:
Harvard subject headings:
Psychedelic art--Encyclopedias.
Psychedelic rock music--Encyclopedias.
Social history--1960-1970--Encyclopedias.
Social movements--History--20th century--Encyclopedias.
Subculture--History--20th century--Encyclopedias.
Princeton subject headings:
Psychedelic art--Encyclopedias.
Psychedelic rock music--Encyclopedias.
Social history--1960-1970--Encyclopedias.
Social movements--History--20th century--Encyclopedias.
Subculture--History--20th century--Encyclopedias.