S468 (B4 I77–78)
F: Huebler, Douglas Duration Piece #7 Rome, 1973 72416 (t) Rosenthal Art Slides (p)
B: School of Visual Arts Library (t)
[Douglas Huebler, Duration Piece #7, 1971, gelatin silver print, in 14 parts with types statement on paper.
A reproduction available here.]

S469 (B4 I79–80)
F: Huebler, Douglas Variable piece #70 1978 Castelli Gall. 51328 (t)
B: School of Visual Arts Library (t)
[Douglas Huebler, Variable Piece #70, 1971, gelatin silver prints.
A reproduction available in Douglas Huebler, « Variable », etc. (Limoges : FRAC Limousin, 1993), 140-142.]