Exhibition catalogue published in conjunction with show held in July 1971. Organized by Jorge Glusberg. Artists include Vito Acconci, Eleanor Antin, Arakawa, Sue Arrowsmith, David Askevold, Walter Ave, John Baldessari, Manuel Barbadillo, Robert Barry, Otto Beckmann, Luis Benedit, Mel Bochner, Christian Boltanski, Ian Breakwell, Eugen Brikcius, Stuart Brisley, Stanley Brouwn, Donald Burgy, Don Celender, Jürgen Claus, James Collins, Christo, Agnes Denes, Mirtha Dermisache, Antonio Dias, Geniy Dignac, Gregorio Dujovny, David Dye, Stano Filko, Barry Flanagan, Terry Fox, Dr. Herbert Franke, Ken Friedman, Hamish Fulton, Nicolás Garcia Uriburu, Jochen Gerz, Gilbert & George, Carlos Ginzburg, Jorge González Mir, Dan Graham, Víctor Grippo, Klaus Groh, Hans Haacke, Olaf Hanel, Rafael Hastings, Douglas Huebler, Peter Hutchinson, Alain Jacquet, Richards Jarden, Allan Kaprow, On Kawara, Michael Kirby, Alain Kirili, Dusan Klimes, J.H. Kocman, Joseph Kosuth, Uzi Kotler, Christie Kozlov, Alexis Rafael Krasilovsky, Josef Kroutvor, Peter Kuttner, David Lamelas, John Latham, Auro Lecci, Les Levine, Richard Long, Lea Lublin, Jorge de Luján Gutiérrez, Mario Mariño, Vicente Marotta, Charles Mattox, Mario Merz, Mauricio Nannucci, Georg Nees, Dennis Oppenheim, Marie Orensanz, Luis Pazos, Alberto Pellegrino, Alfredo Portillos, Juan Pablo Renzi, Dorothea Rockburne, Juan Carlos Romero, Edward Ruscha, Bernardo Salcedo, Jean Michel Sanéjouand, Richard Serra, Petr Stembera, Clorindo Testa, Antonio Trotta, Timm Ulrichs, Franco Vaccari, Jiri Valoch, John van Saun, Bernar Venet, Edgardo Antonio Vigo, Lawrence Weiner, Ian Wilson, Robert Wittmann, William Woodrow and Gilberto Zorio. Includes biographies of the artists. Text in English and Spanish.