'Robert Mangold', Fischbach Gallery, New York, October-23 November 1966, no cat. no.
'Robert Mangold', Solomon R. Guggenheim Museum, New York, 1971, cat. no. 6 (ill., with date as 1967).
'Object and Content: Meaning in Minimal Art', Australian National Gallery at the Drill Hall Gallery, Canberra, 24 November-20 January 1991, no cat. no.