- NAUMAN Bruce, Studies for Hologram, 1970 (silkscreen on glossy cover stock. 26’’ x 26’’ (série Making Faces).
— Willoughby Sharp, « Body Works : A Pre-Critical, Non-Definitive Survey of Very Recent Work Using the Human Body or Parts Thereof », Avalanche, no. 1, Fall 1970, pp. 14-17. Extrait :
« The previous year (in 1968), Bruce Nauman made a series of eight by ten inch holograms, Making Faces. On the afternoon of Tuesday May 12, 1970 he went into a vacant Pasadena lot and clapped his hands… »