Columbia subject headings:
Harvard subject headings:
Books and reading--Congresses
Carthusians--Books and reading--Congresses.
Carthusians--Congresses.
Carthusians--Libraries--History--Congresses.
Monastic libraries--Congresses.
Princeton subject headings:
Carthusians--Books and reading--Congresses.
Carthusians--Congresses.
Carthusians--Libraries--History--Congresses.
Monastic libraries--Congresses.