Piet Mondrian : 1872-1944 (Exhibition Toronto, Art Gallery, 12.02.1966 - 20.03.1966 ; Philadelpia, Museum of Art, 08.04.1966 - 09.05.1966 ; Den Haag, Gemeentemuseum, 15.06.1966 - 07.08.1966). - Welsh, Robert P. (The Art Gallery of Ontario,, 1966)