Columbia subject headings:
Church music--Germany--Cologne (Electorate)--Congresses.
Music--Germany--Cologne (Electorate)--Congresses.
Harvard subject headings:
Church music--Germany--Cologne (Electorate)--15th century--Congresses.
Church music--Germany--Cologne (Electorate)--16th century--Congresses.
Music--Germany--Cologne (Electorate)--15th century--Congresses.
Music--Germany--Cologne (Electorate)--16th century--Congresses.
Princeton subject headings:
Church music--Germany--Cologne (Ecclesiastical principality)--Congresses.
Music--Germany--Cologne (Ecclesiastical principality)--Congresses.