S113 (B2 I19–20)
F: Barry, R. All The Things I Know, 1969. Hunter, pl. 771 (P49.279Y) (t)
B: Dept. Art History Columbia Univ., Oct 17 1977 (p)
[Robert Barry, All The Things I Know but of Which I am Not at the Moment Thinking – 1.36 PM, June 15, 1969, 1974, print. Dup. S252.
A view of Barry’s work available here.]

S251 (B3 I41–42)
F: Barry, Robert Psychic Series 1969 16369 (t)
B: School of Visual Arts Library (t) 16369 (h)
[Robert Barry, Psychic Series, 1969, in the catalogue Carl Andre, Robert Barry, Daniel Buren, Jan Dibbets, Douglas Huebler, Joseph Kosuth, Sol LeWitt, Richard Long, N. E. Thing Co. Ltd, Robert Smithson, Lawrence Weiner (New York: Seth Siegelaub, July-August-September 1969).
A reproduction available (as the second image) here.]

S252 (B3 I41–42)
F: Barry, Robert All The Things I Know but of Which I Am Not at the Moment Thinking Castelli 16368 (t)
B: School of Visual Arts Library (t) 16369 (h)
[Robert Barry, All The Things I Know but of Which I am Not at the Moment Thinking – 1.36 PM, June 15, 1969, 1974, print. Dup. S113.
A view of Barry’s work available here.]