Columbia subject headings:
Art--Germany--Essen--Catalogs.
Drawing, European--19th century--Catalogs.
Museum Folkwang Essen--Catalogs.
Watercolor painting, European--19th century--Catalogs.
Harvard subject headings:
Art--Germany--Essen--Catalogs.
Drawing, European--19th century--Catalogs.
Museum Folkwang Essen--Catalogs.
Watercolor painting, European--19th century--Catalogs.
Princeton subject headings:
Catalogs.
Drawing, European--19th century--Catalogs.
Drawing--Germany--Essen--Catalogs.
Museum Folkwang Essen--Catalogs.
Watercolor painting, European--19th century--Catalogs.
Watercolor painting--Germany--Essen--Catalogs.