"Kunst." . . . . "Change of perception the perception of change" . . . "Change of perception the perception of change"@en . . "The change of perception, the perception of change. [Exhibition held at the] Art Gallery of the University of Notre Dame, 25 Aug. 27 Oct. 1968" . "The change of perception : the perception of change" . . . "Exhibition catalogs" . . . . . . . . "Tentoonstellingscatalogus" . . . .