JULY, AUGUST, SEPTEMBER 1969 / JUILLET, AOUT, SEPTEMBRE 1969 – CATALOG OF THE EXHIBITION: 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. 1969.