Columbia subject headings:
Books and reading--Germany--History--19th century--Sources.
Libraries--Germany--Catalogs.
Library catalogs--Germany--Bibliography--Catalogs.
Harvard subject headings:
Books and reading--Germany--History--19th century--Sources.
Libraries--Germany
Library catalogs--Germany--Bibliography--Catalogs.
Princeton subject headings:
Books and reading--Germany--History--19th century--Sources.
Libraries--Germany--Catalogs.
Library catalogs--Germany--Bibliography--Catalogs.