Columbia subject headings:
Harvard subject headings:
Cities and towns, Medieval--Europe, Northern.
Music--Europe, Northern--15th century--History and criticism.
Music--Europe, Northern--500-1400--History and criticism.
Stadtpfeifer.
Princeton subject headings:
Music--Germany--500-1400--History and criticism.
Music--Germany--History and criticism.
Music--Social aspects.
Musicians--Legal status, laws, etc.