“San Francisco Art Annual”, San Francisco Museum of Art, 1959

“Gruppo Numero”, Galleria Kasper, Lausanne, Traghetto, Venice,
1959-1963

“Oakland Art Annual”, Oakland Museum of Art, 1960

“Mostra di Numero a Genova”, Societa di Cultura, Genoa, 1960

“Festival of Two Worlds”, Spoletto, Italy, 1960

“Group Exhibition”, Meredith Long Gallery, Houston, 1971

“San Francisco Art Institute Centennial Exhibition”, San Francisco Art Institute, 1973

“Selected Works for the Museum Collections”, Phoenix Museum of Art, 1973

“Testimonianze di varie tendenze a numero dal 1951 al 1963” Galleria Fiamma Vigo, Rome, 1973

“Crocker-Kingsley Annual”, Crocker-Kingsley Museum of Art, Sacramento, 1976

“Portraits”, Lawson Galleries, San Francisco, 1976, 1977

“Group Exhibition”, Hill Gallery, Santa Fe, 1977

“Three New York Painters”, Galerie Geilsdorfer, Koln, Germany, 1982

“Animal Life - Contemporary Representation, Ericson Gallery, New York, 1982