Exhibition catalogue published in conjunction with show held at the Los Angeles County Museum of Art, April 28 - June 25, 1967; and the Philadelphia Museum of Art, September 15 - October 29, 1967. Text by Maurice Tuchman, Lawrence Alloway, Wayne V. Andersen, Dore Ashton, John Coplans, Clement Greenberg, Max Kozloff, Lucy R. Lippard, James Monte, Barbara Rose, and Irving Sandler. Artists featured are Arlo Acton, Peter Agostini, Carl Andre, Stephen Antonakos, Larry Bell, Fletcher Benton, Tony Berlant, Ronald Bladen, Alexander Calder, Anthony Caro, John Chamberlain, Chryssa, Bruce Conner, Joseph Cornell, Tony DeLap, Walter de Maria, Jose de Rivera, Mark di Suvero, Tom Doyle, Dan Flavin, Peter Forakis, William R. Geis III, Judy Gerowitz, David Gray, Robert Grosvenor, Lloyd Hamrol, Paul Harris, Duayne Hatchett, Robert A. Howard, Robert Hudson, Donald Judd, Ellsworth Kelly, Edward Kienholz, Frederick J. Kiesler, Lyman Kipp, Gabriel Kohn, Gary Kuehn, Sol LeWitt, Alexander Liberman, Alvin Light, Len Lye, John McCracken, Marisol, John Mason, Charles Mattox, Robert Morris, Robert Murray, Reuben Nakian, Bruce Nauman, Louise Nevelson, Isamu Noguchi, Claes Oldenburg, Harold Persico Paris, Kenneth Price, Richard Randell, Robert Rauschenburg, George Rickey, Lucas Samaras, George Segal, David Smith, Tony Smith, Robert Smithson, Kenneth Snelson, Robert Stevenson, George Sugarman, Michael Todd, Ernest Trova, Anne Truitt, DeWain Valentine, Vasa, Stephan Von Huene, David Von Schlegall, Peter Voulkos, David Weinrib, H.C. Westermann, William T. Wiley, Norman Zammitt, and Wilfrid Zogbaum.