Columbia subject headings:
Group work in art.
Improvisation (Music)
Music--Performance--History.
Harvard subject headings:
Group work in art--Congresses.
Improvisation (Music)--Congresses.
Jazz--1961-1970--Congresses.
Music and technology--History--20th century--Congresses.
Music--20th century--History and criticism--Congresses.
Music--Performance--History--Congresses.
Princeton subject headings:
Group work in art.
Improvisation (Music)
Music--Performance--History.