Installation view of Charles Brittin exhibition at Semina Gallery in Larkspur, California, 1961. The Getty Research Institute, Charles Brittin papers, 2005.M.11.19. © J. Paul Getty Trust. Photo by Charles Brittin

Robert Alexander, ca. 1960. The Getty Research Institute, Charles Brittin papers, 2005.M.11.20 © J. Paul Getty Trust. Photo by Charles Brittin

Exterior view of the Semina Gallery in Larkspur, California, with partial view of Charles Brittin’s exhibition. 1961. The Getty Research Institute, Charles Brittin papers, 2005.M.11.21 © J. Paul Getty Trust. Photo by Charles Brittin

Suzi and Eddie Hicks at Charles Brittin exhibition at Semina Gallery in Larkspur, California, 1961. The Getty Research Institute, Charles Brittin papers, 2005.M.11.24 © J. Paul Getty Trust. Photo by Charles Brittin

Ed Ruscha holding his book Every Building on the Sunset Strip, 1967. © Ed Ruscha. Image courtesy of Jerry McMillan and Craig Krull Gallery, Santa Monica. © Jerry McMillan

Announcement for "Roofle," a Tap City Circus raffle in Los Angeles, October 30, 1966. Designed by George Herms. Letterpress, woodblock, and rubber stamping. The Getty Research Institute, Gift of Hal Glicksman, 2009.M.5.6

Announcement for George Herms exhibition at Aura Gallery in Pasadena, California, 1963. Designed by Wallace Berman. The Getty Research Institute, Gift of George Herms, 2009.M.20.3. Courtesy of the Estate of Wallace Berman and Michael Kohn Gallery, Los Angeles

Announcement for George Herms exhibition Nativity '63 at Rolf Nelson gallery in Los Angeles, 1963. © George Herms. The Getty Research Institute, Gift of Michael Asher, 2009.M.30.9

Poster for Ed Moses exhibition at Mizuno Gallery in Los Angeles, 1969. Courtesy Mizuno Gallery. The Getty Research Institute, Gift of Michael Asher , 2009.M.30

Judy Gerowitz, also known as Judy Chicago, with her Sunset Squares installation at Rolf Nelson Gallery in Los Angeles, 1966. © 2011 Judy Chicago / Artists Rights Society (ARS), New York. The Getty Research Institute, Gift of Rolf G. Nelson, 2010.M.38. Image courtesy of Jerry McMillan and Craig Krull Gallery, Santa Monica. © Jerry McMillan

Poster for Craig Kauffman exhibition at Ferus Gallery in Los Angeles, 1962. © The Estate of Craig Kauffman. The Getty Research Institute, Gift of Michael Asher, 2009.M.30.16. Courtesy Frank Lloyd Gallery, Santa Monica, California

Artists’ protest poster and manifesto, "Stop: We Dissent," 1965. Designed by Hardy Hanson. Courtesy of the artist. The Getty Research Institute, Charles Brittin papers, 2005.M.11.30

Inside and Out, 1964, Melvin Edwards. Welded steel. 12 x 8 3/4 x 5 3/4 in. Collection of Susan and David Lawrence. © Melvin Edwards

Frederick Eversley polishing one of his sculptures, 1970. Image courtesy of and © Frederick Eversley

Andrew Perchuk, Getty Research Institute, with John Mason inspecting Mason’s sculpture Orange Cross, 2010. © J. Paul Getty Trust