In the booth of New York’s Alden Projects: WALL SHOW – PART 1. Lawrence Weiner, Douglas Huebler, Bob Huot, Robert Ryman, Mel Bochner, Sol Lewitt, Bill Bollinger / Ace (Gallery) . . . Los Angeles, California, rubberstamp on sheetrock, 1969. Cited by Lucy Lippard as follows: “Consecutively executed wall pieces” (Lippard, Six Years, p. 107.) Reproduced in Roberta Smith, “Art Invitations As Small Scraps of History,” New York Times, May 16, 1993.