Columbia subject headings:
Art, Abstract--Exhibitions.
Dekkers, Ad, 1938-1974--Exhibitions.
Dekkers, Ad, 1938-1974--Friends and associates.
Harvard subject headings:
Art, Abstract--Exhibitions
Dekkers, Ad, 1938---Exhibitions.
Dekkers, Ad, 1938---Friends and associates--Exhibitions.
Dekkers, Ad, 1938-1974--Exhibitions.
Installations (Art)--Netherlands--Amsterdam--Exhibitions.
Princeton subject headings:
Art, Abstract--Exhibitions.
Dekkers, Ad, 1938---Exhibitions.
Installations (Art)--Netherlands--Amsterdam--Exhibitions.