'Three Young Americans', Allen Memorial Art Museum, Oberlin College, Oberlin, Ohio, 17 April-12 May 1970.
'Amerikanischer Fotorealismus', Württembergischer Kunstverein, Stuttgart, 16 November-26 December 1972, cat. no. 12 (ill.), travelled to Frankfurter Kunstverein, 6 January-18 February 1973; to Kunst and Museumverein, Wuppertal, 25 February-8 April 1973.
'Colossal Scale', Sidney Janis Gallery, New York, 9 March-1 April 1972, no cat. no.
'Grands Maîtres Hyperréalistes Americains', Galerie des Quatre Mouvements, Paris, 23 May-15 June 1973, cat. no. 4 (ill.); travelled to '4e Salon International D'Art', Basle, 20-25 June 1973.
'ARS'74', Ateneum, Fine arts Academy of Finland, Helsinki, May 1974.
'Kijken naar de Werkelijkheid', Museum Boymans-van Beuningen, Rotterdam, 1 June-18 August 1974, cat. no. 12
'Photo-Realism Exhibition', Edwin A. Ulrich Museum of Art, Wichita State University, Kansas, 2 April-4 May 1975.
'Genesis of a Gallery, 1976-77', no cat. no. (ill.).
'Close Portraits', Walker Arts Center, Minneapolis, 28 September-16 November 1980, cat. no. 29, p.64 (ill.); travelled to St Louis Art Museum, 5 December 1980-25 January 1981; to Museum of Contemporary Art, Chicago, 6 February-29 March 1981; to Whitney Museum of American Art, New York, 14 April-21 June 1981.