Columbia subject headings:
Art--Germany--Berlin--Catalogs.
Eckmann, Otto, 1865-1902--Catalogs.
Kunstbibliothek (Berlin, Germany)--Catalogs.
Harvard subject headings:
Princeton subject headings:
Eckmann, Otto, 1865-1902--Catalogs.
Kunstbibliothek (Berlin, Germany)--Catalogs.