Columbia subject headings:
Harvard subject headings:
Art, Modern--20th century--Private collections--Exhibitions.
Art, Modern--21st century--Private collections--Exhibitions.
Kagge, Erling--Art collections--Exhibitions.
Princeton subject headings:
Art, Modern--20th century--Private collections--Exhibitions.
Art, Modern--21st century--Private collections--Exhibitions.
Kagge, Erling--Art collections--Exhibitions.