Columbia subject headings:
Incunabula--Switzerland--Zurich--Bibliography--Catalogs.
Zentralbibliothek Zürich--Catalogs.
Harvard subject headings:
Incunabula--Switzerland--Zurich--Bibliography--Catalogs.
Zentralbibliothek Zürich--Catalogs.
Princeton subject headings:
Catalogs.
Incunabula--Switzerland--Zurich--Bibliography--Catalogs.
Zentralbibliothek Zürich--Catalogs.