Cartella comprendente 73 multipli suddivisi in 6 volumi edita da "The Letter Edged in Black Press", New York, nel 1968 in 57 esemplari, ristampata nel 1988 in 2000 esemplari. Portfolio 1: Irving Petlin, Su Braden, James Lee Byars, Christo, Walter de Maria, Richard Hamilton, Kaspar Koening, Julien Levy, Sol Mednick, Nancy Reitkopf, La Monte Young & Mariann Zazeela Portfolio 2: Marcel Duchamp, Nicolas Calas, Bruce Conner, Marcia Herscovitz, Alain Jacquet, Ray Johnson, Lee Lozano, Meret Oppenheim, Bernard Pfreim, George Reavey, Clovis Trouille Portfolio 3: John Battan, Aftograf, Enrico Baj, William Bryant, Dick Higgins, Joseph Kosuth, Ronnie Landfield, Roland Penrose, Man Ray, H.C. Westermann, Hannah Weiner, Terry Riley Portfolio 4: Robert Stanley, Arman, Paul Bergtold, John Cage, Hollis Frampton, On Kawara, Roy Lichtenstein, Lil Picard, Domenico Rotella, Robert Watts, Princess Winifred, La Monte Young, Marian Zazeela Portfolio 5: Congo, William Anthony, Wall Batterton, William Copley, Edward Fitzgerald, Neil Jenney, Angus MacLise, Bruce Nauman, Yoko Ono, Mel Ramos, Robert Rohm, William Schwedler, Diane Wakoski, Lawrence Weiner Portfolio 6: Richard Artschwager, Ed Bereal, Deiter Roth, Betty Dodson, Ronoldo Ferri, John Giorno, Toby Mussman, Adrian Nutbeem, Claes Oldenburg, Mischa Petrov, Jean Reavey, Bernar Venet.