Cardiff, Wales, Canadian Commonwealth Festival, 1966
‘Contemporary Canadian Drawings and Prints’, toured Australia under Extension Dept. of the National Gallery, 1967
Santiago, Chile, 4th American Print Biennale, 1970
Bradford, England, 1968, 1970, 1972
Northwest Printmakers, Seattle, Washington, 1970
Associated American Artists, New York, 1970
International Buchkunst, Austellung, Leipzig, 1971
Pratt Institute, New York, 1971
Canadian Embassy, Washington, DC, 1971
Print Biennale, Llublijana, Yugoslavia, 1971, 1973, 1975, 1977, 1979
Venice Biennale, Graphics Show, 1972
Biella, Italy, Biennale, 1971, 1973, 1975
Buenos Aires Biennale, 1970, 1972
Florence, Italy, 1970
Krakow, Poland, 1970, 1972, 1974, 1978
Basle, Switzerland, 1974
Canadian Cultural Centre, Paris, 1974
Brussels, Belgium, 1974
Canada House, 1975
Norwegian Print Biennale, 1976
International Graphic Biennale, Frechen, Germany, 1976, 1978, 1980
Gamlebyen, Norway, 4th Print Biennale, 1978, 1980
Listowel, Ireland, 1978, 1980
Grenchen, Switzerland, International Triennale of Colour Prints, 1978
5th Biennale de Artes Plasticas, Lisbon, 1985