Artists outside the Ferus Gallery in Los Angeles, 1959. Clockwise from top: Billy Al Bengston, Irving Blum, Ed Moses, and John Altoon. Photo by William Claxton. Courtesy Demont Photo Management, LLC.

Irving Blum with Andy Warhol's Campbell's Soup Cans at the Ferus Gallery in Los Angeles, 1962. Photo by William Claxton. Courtesy Demont Photo Management, LLC.

Helen Pashgian working in her studio in the 1970s. Photo by Walt Mancini. Courtesy of and © Helen Pashgian

Peter Alexander in 1966. Image courtesy of and © Billy Al Bengston

Helen Pashgian polishing one of her sculptures in the Baxter Art Gallery at the California Institute of Technology in Pasedena for an artists in residence exhibition, 1970. Courtesy of and © Helen Pashgian

Melvin Edwards in January 1965. Image courtesy of Melvin Edwards

Poster for Karl Benjamin exhibition at the Esther-Robles Gallery in Los Angeles, 1964. © Karl Benjamin. The Getty Research Institute, Gift of Michael Asher, 2009.M.30.12

Ed Ruscha in his studio at 1024 3/4 N. Western Avenue in Hollywood, California, 1970. Image courtesy of Billy Al Bengston. Photo © Larry Bell

Announcement for Frederick Eversley exhibition Colored Parabolic Space at the Quay Gallery in San Francisco, 1971. © Frederick Eversley. The Getty Research Institute, Gift of George Herms, 2009.M.20

Protest on La Cienega Boulevard, outside the Ferus Gallery, May 15, 1965. The Getty Research Institute, Charles Brittin papers, 2005.M.11. © J. Paul Getty Trust. Photo by Charles Brittin

“Artists Against Escalation” protest at LACMA (Los Angeles County Museum of Art), May 16, 1965. The Getty Research Institute, Charles Brittin papers, 2005.M.11.32. © J. Paul Getty Trust. Photo by Charles Brittin

Los Angeles Council of Women Artists Report, June 15, 1971. The Getty Research Institute, 2003.M.46

Selected Press Reaction to “Sex Differentials in Art Exhibition Reviews,” publication by Tamarind Lithography Workshop, 1972. The Getty Research Institute, Gift of Hal Glicksman, 2009.M.5.21. Courtesy of June Wayne/Tamarind Lithography Workshop, Inc.

Cover of Womanspace journal, vol. 1, no. 1, 1973. The Getty Research Institute, Gift of Hal Glicksman, 2009.M.5.20. Courtesy of Judy Chicago

Rani Singh of the Getty Research Institute and Jack Brogan, conservator, inspect De Wain Valentine's Red Concave Circle in Brogan's studio in Inglewood, California, June 17, 2011. © De Wain Valentine