Columbia subject headings:
Essl, Agnes--Art collections--Exhibitions.
Essl, Karlheinz, 1939---Art collections--Exhibitions.
Painting, Austrian--20th century--Exhibitions.
Painting, Austrian--Exhibitions.
Painting--Private collections--Austria--Klosterneuburg--Exhibitions.
Harvard subject headings:
Essl, Agnes--Art collections--Exhibitions.
Essl, Karlheinz, 1939---Art collections--Exhibitions.
Essl, Karlheinz, Kommerzialrat--Art collections--Exhibitions.
Painters--Austria--Biography.
Painting, Austrian--Exhibitions.
Painting, Modern--20th century--Austria--Exhibitions.
Painting, Modern--20th century--Exhibitions
Painting, Modern--Austria--20th century--Exhibitions.
Painting--Private collections--Austria--Klosterneuburg--Exhibitions.
Princeton subject headings:
Essl, Agnes--Art collections.
Essl, Karlheinz, Kommerzialrat--Art collections.
Painting, Austrian--Private collections--Exhibitions.
Painting, Modern--20th century--Austria--Private collections--Exhibitions.