Columbia subject headings:
Harvard subject headings:
Classification.
Collectibles--History.
Collectors and collecting--Europe--History.
Collectors and collecting--History.
Collectors and collecting--Philosophy.
Collectors and collecting--Switzerland--Zurich--History--19th century.
Eidg. Polytechnikum zu Zürich--Buildings.
Science--Methodology
Technical institutes--Switzerland--Zurich--History--19th century.
Princeton subject headings:
Classification.
Collectors and collecting--Europe--History.
Collectors and collecting--History.
Collectors and collecting--Philosophy.
Collectors and collecting--Switzerland--Zurich--History--19th century.
Eidg. Polytechnikum zu Zürich--Buildings.
Science--Methodology.
Technical institutes--Switzerland--Zurich--History--19th century.