Exhibition catalogue published in conjunction with a two part show held at the Tyler School of Art of Temple University, Philadephia, Part I : January 19 - February 8, 1979; Part II : January 21 - February 10, 1980. Essay by Lucy R. Lippard. Artists include Roger Brown, Hanne Darboven, Jackie Ferrara, Laura Grisi, Jan Groover, Jane Kaufman, Jackson Mac Low, Paul Mogensen, Jim Nutt, Steve Reich, Barbara Rossi, Morteza Sazegar, Nurit Tilles, Edmund Niemann, Robert Zakanitch, Zero Moving Dance Company, Siet Zuyderland. Includes artist's biographies, checklist, illustrations.