Columbia subject headings:
Painting--Germany--Bonn--Catalogs.
Rheinisches Landesmuseum Bonn--Catalogs.
Wesendonck, Otto, 1815-1896--Art collections.
Harvard subject headings:
Painting--Germany--Bonn--Catalogs.
Rheinisches Landesmuseum Bonn--Catalogs.
Wesendonk, Otto, -1896--Art collections.
Princeton subject headings:
Painting--Germany (West)--Bonn--Catalogs.
Rheinisches Landesmuseum Bonn--Catalogs.
Wesendonk, Otto, d. 1896--Art collections.