Robert Barry, four Art & Project bulletins
Amsterdam, 1969-1976. All single folded sheets, 29.5 x 21 cm, 4 pp. printed b/w. Unmailed, unfolded and in mint condition.
(1) No.17 Dec 1969. (2) No.37 April 1971. (3) No.51 March 1972. Slidepieces 1971-1972. (4) No.97 February 1976. (total 4)