Columbia subject headings:
Chorales.
Dedication services.
Gertrudenkapelle (Hamburg, Germany)
Gregorian chants.
Masses.
Motets.
Organ music.
Harvard subject headings:
Chorales.
Dedication services.
Gertrudenkapelle (Hamburg, Germany)
Gregorian chants.
Masses.
Motets.
Organ music.
Princeton subject headings:
Dedication services.
Gertrudenkapelle (Hamburg, Germany)
Sacred vocal music--Germany--Hamburg--17th century.