Antwerpen: A 37 90 89, n.d. (1969)
30 x 21cm, 1pp. b/w mimeograph. Effectively a manifesto leaflet written by the “co-ordinator” of the space Koenig to explain the name and the purpose of the A 37 90 89 space (the title was the telephone number) and announcing future shows by Koepke, Vautier and possibly On Kawara. VG+.