M. Raynal, Jacques Lipchitz , Paris, 1947 (basalt version illustrated). A.C. Ritchie, Sculpture of the Twentieth Century , New York, 1952, p. 229 (basalt version illustrated p. 140). A.M. Hammacher, Jacques Lipchitz: His Sculpture , New York, 1960, no. 44, p. 174 (basalt version illustrated). R. Goldwater, What is Modern Sculpture? , New York, 1969, pp. 20 &144 (limestone version illustrated p. 21). J. Lipchitz & H.H. Arnason, My Life in Sculpture , New York, 1972, p. 103 (basalt version illustrated fig. 83). A.M. Hammacher, Jacques Lipchitz: His Sculpture , New York, 1975, p. 173 (stone version illustrated pl. 44). A.E. Elsen, Unknown Beings and Other Realities , New York, 1979, p. 31 (bronze version illustrated). A.G. Wilkinson, The Sculpture of Jacques Lipchitz, A Catalogue Raisonné , vol. I, The Paris Years 1910-1940 , London, 1996, no. 215, p. 221 (bronze version illustrated p. 80)