- Parcheggio di Villa Borghese1 objects
- Paterson, Katie1 objects
- Patterson, Ben1 objects
- Pozzi, Lucio1 objects
- Printed Editions1 objects
- Printed Matter, Inc.1 objects
- Richard Demarco Gallery1 objects
- Roth, Moira1 objects
- Ryman, Robert1 objects
- Shepherd, William C.1 objects
- Sladden, Richard1 objects
- Solt, Mary Ellen1 objects
- Stein, Donna; Padgett, Ron; Peck, George1 objects
- Strauss, David Levi1 objects
- Tamblyn, Christine1 objects
- Tisdall, Caroline1 objects
- Truth, Sojourner1 objects
- United Art Contractors/Minor Conceptual Arts1 objects
- Unknown (Germany)1 objects
- Unknown (Unknown)1 objects