J.P. Hodin, Barbara Hepworth, Neuchâtel, 1961, no. 211 (concrete version illustrated).
A. Bowness, ed., The Complete Sculpture of Barbara Hepworth 1960-69, London, 1971, p. 46, no. 453 (with incorrect reference of Hodin no. 210).
M. Gale and C. Stephens, Barbara Hepworth Works in the Tate Gallery Collection and the Barbara Hepworth Museum St. Ives, London, 1999, p. 154, no. 36 (another cast illustrated, p. 155).