Exhibition catalogues
Tentoonstellingscatalogi
Los Angeles: Los Angeles County Museum of Art; 1971
Tentoonstelling: Dublin, National Gallery of Ireland, 1972/08/09-1972/10/01
Tentoonstelling: Los Angeles, Los Angeles County Museum of Art, 1972/12/21-1972/02/27
Tentoonstelling: Londen, Royal Academy of Arts, 1972/06/24-1972/07/24