https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!1114889~!0#focus ...

"An exhibition organized by the Art Gallery, Center for Inter-American Relations, New York, and the Centro de Artes Visuales del Instituto Torcuato di Tella, Buenos Aires ... March 21-May 12, 1968 ...