Columbia subject headings:
Harvard subject headings:
Catholic Church--Germany--Cologne--History--Sources--Congresses.
Catholic Church--Liturgy--Texts--History and criticism--Congresses.
Erzbischöfliche Diözesan- und Dombibliothek (Cologne, Germany)--Congresses.
Illumination of books and manuscripts, Medieval--Germany--Cologne--Congresses.
Manuscripts, Medieval--Germany--Cologne--Congresses.
Princeton subject headings:
Catholic Church--Germany--Cologne--History--Sources--Congresses.
Catholic Church--Liturgy--Texts--History and criticism--Congresses.
Erzbischöfliche Diözesan- und Dombibliothek (Cologne, Germany)--Congresses.
Illumination of books and manuscripts, Medieval--Germany--Cologne--Congresses.
Manuscripts, Medieval--Germany--Cologne--Congresses.