Freeway, 1966, Vija Celmins. Oil on canvas. 17 1/2 x 26 3/8 in. Collection of Harold Cook, Ph.D. © Vija Celmins. Image courtesy McKee Gallery, New York

Ed Ruscha and Joe Goode on horseback. Exhibition catalogue cover for the Fine Arts Patrons of Newport Harbor at the Balboa Pavillion Gallery, 1968. Image courtesy of Jerry McMillan and Craig Krull Gallery, Santa Monica. © Jerry McMillan

Several Los Angeles artists at Culture Day at LACMA (L.A. County Museum of Art), 1968. Photo by and © Julian Wasser.

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.

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

Betty Asher and Henry Hopkins in front of Ed Ruscha's painting The Los Angeles County Museum on Fire (1965–68), ca. late 1960s. © Ed Ruscha. The Getty Research Institute, Betty Asher Papers, Gift of Michael Asher, 2009.M.30

Vija Celmins in her studio in Venice, California, 1966. Photo by Tony Berlant. Art © Vija Celmins

Poster for the exhibition New Painting of Common Objects at the Pasadena Art Museum, 1962. Wood-type letterpress on paper. 42 3/8 x 28 in. Image courtesy of the Ed Ruscha Studio

An exhibition at Billy Al Bengston’s Artist Studio, with works by Ed Ruscha, Peter Alexander, and John McCracken, 1970. Image courtesy of Billy Al Bengston

John Baldessari in 1960. Image courtesy of John Baldessari

John Baldessari in the late 1960s. Image courtesy of John Baldessari

John Baldessari (left) at the opening of his exhibition at the Molly Barnes Gallery in Los Angeles, 1968. Photo by Phillip T. Jones and courtesy of John Baldessari. © Phillip T. Jones

John Baldessari at the opening of his exhibition at the Molly Barnes Gallery in Los Angeles, 1968. Photo by Phillip T. Jones and courtesy of John Baldessari. © Phillip T. Jones

Joe Goode in his studio, ca. 1970. Image courtesy of Steven Steinman. © Steven Steinman

Joe Goode, Jerry McMillan, Ed Ruscha, and Patrick Blackwell in the studio space they shared while in school at Chouinard, ca. 1959. Photo by Patrick Blackwell. Courtesy of the Joe Goode Studio