Invitation for Condition by Felipe Ehrenberg July 1- 14 1973, coll. Pieter L. Mol
String Event in In-Out Center, with Felipe Ehrenberg and child (Gudmundsson?), photo source unknown
Performance String Condition by Felipe Ehrenberg in In-Out Center, image source unknown, with Martha Hellion (left)
Performance String Event Felipe Ehrenberg, with unidentified person in front looking at a copy of the Hungarian Schmuck, a Beau Geste publication. In the back Ulises Carrion and unspecified person, photo source unknown
Hungarian Schmuck, editors Felipe Ehrenberg and David Mayor, Cullompton, Beau Geste Press, march/april 1973 - 76 pages, 28,8 x 20,8 cm . Hungarian Schmuck is part 3 from the 8 part Schmuck Anthological series of Beau Geste Press.
Letter on july 13 1973 from Felipe Ehrenberg to Roger d'Hondt regarding sending the announcement of Condition at In-Out Center and mentioning plans to make a catalogue of this event. The specific catalogue has not been found (or made). New Reform Archive, coll. Roger d'Hondt and Marie-Helene van Audenhove
Interview Hans Ulrich Obrist and Felipe Ehrenberg, Hans Ulrich Obrist, Conversations in Mexico, alumnos47.org
Remake of the original String Event (1973) in galeria Freijo Madrid 2010, photo Pablo Duarte Medina