T. Godfrey, Painting Today, London 2009, no. 132 (illustrated in colour with incorrect dimensions, p. 109). (christies.com)
cat., London, Whitechapel Gallery, 1970, p. 25, no 61.16 (listed with incorrect dimensions) N. Stangos, David Hockney by David Hockney, London 1976, p. 298, no. 40 (illustrated, p. 58). (christies.com)
Who knows what hidden damage lurks underneath the paint of used parts, and some aftermarket parts are of questionable quality, with incorrect dimensions and thickness that can make them hard to fit and less durable, with a less than satisfactory finished appearance. (carid.com)