GYSIN, Brion (American, 1916–1986). BURROUGHS, William S. (American, 1914–1997). Permutations Foldout Program. Paris: 1973. SIGNED by Brion Gysin on recto. SIGNED by William S. Burroughs on verso. Program for an exhibition of paintings from Brion Gyson at Galerie Weiller in Paris with a transcription of a conversation between Gysin and Burroughs. 6 ½ x 5" folded. 13 x 14 ½" unfolded. Some toning; crease to bottom right corner.