L.A. Odyssey, 1969, Diane di Prima (poet), cover design by George Herms. Poets Press, San Francisco, 1969. Offset lithograph. 8 5/8 x 5 9/16 x 1/16 in. Book © Diane di Prima. The Getty Research Institute, Gift of George Herms, 2009.M.20.27. Cover image © George Herms

Larry Bell’s studio in 1970. Photo by Larry Bell. Image courtesy of Billy Al Bengston

Los Angeles, 1964, Garry Winogrand. Gelatin silver print. 9 x 13 7/16 in. © 1984 The Estate of Garry Winogrand

The Los Angeles County Museum on Fire, 1965–68, Ed Ruscha. Oil on canvas. 53 1/2 x 133 1/2 in. Hirshhorn Museum and Sculpture Garden, Smithsonian Institution, Washington, D.C., Gift of Joseph H. Hirshhorn, 1972. © Ed Ruscha. Photography by Lee Stalsworth

Los Angeles International Airport, 1964, Garry Winogrand. Gelatin silver print. 13 1/2 x 8 15/16 in. © 1984 The Estate of Garry Winogrand

Magicians Garden, 1963, Billy and Joan Jahrmarkt. Verifax on cardstock and metal screw. Self-published book. 3 5/8 x 2 9/16 x 5/8 in. The Getty Research Institute, Gift of George Herms, 2009.M.20 © Billy and Joan Jahrmarkt

Ed Moses with his installation at Mizuno Gallery, 1970. Image courtesy of and © Billy Al Bengston

Exterior view of Nicholas Wilder Gallery at the time of Ronald Davis's first solo exhibition in 1965. Image courtesy of Ronald Davis

Ocean Park Series, 1962, John Altoon. Oil on canvas. 72 x 84 in. Orange County Museum of Art, Newport Beach, CA: Museum purchase with additional funds provided by Dr. James B. Pick and Dr. Rosalyn M. Laudati, Mr. Ward Chamberlin, Mrs. E.G. Chamberlin, Patricia Fredericks, Mr. and Mrs. Carl Neisser, Mr. and Mrs. John Martin Shea, Mr. and Mrs. Samuel Goldstein, Zada Taylor, Mr. David H. Steinmetz, and Mrs. Bernard McDonald. Permission courtesy of the Estate of John Altoon and Braunstein/Quay Gallery, San Francisco, CA. Photo by Gene Ogami

Orange Cross, 1963, John Mason. Ceramic with glaze. 64 x 49 x 16 in. Collection of Vernita Mason. © John Mason. Photo by Roxanne Hall Morganti

Papa's Got a Brand New Bag, 1964, Wallace Berman. Mixed media collage. 44 1/2 x 32 ¼ x 2 in. Collection of David Yorkin & Alix Madigan, Los Angeles. Permission courtesy of the Estate of Wallace Berman and Michael Kohn Gallery, Los Angeles

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

Peace Tower installation in Los Angeles, 1966. The Getty Research Institute, Charles Brittin papers, 2005.M.11.37. © J. Paul Getty Trust. Photo by Charles Brittin

John Mason and Peter Voulkos photographing a sculpture outside their shared studio on Glendale Boulevard in Los Angeles, ca. 1959. Courtesy of the Voulkos & Co. Catalogue Project

Quality Material, 1966–68, John Baldessari. Acrylic on canvas. 67 3/4 x 56 1/2 in. Collection of Danielle and David Ganek. © John Baldessari