Literature
P. Fechter, Käthe Kollwitz, Plastiken, Berlin, 1947 (another cast illustrated).
A. Heilborn, Käthe Kollwitz, Berlin, 1949 (another cast illustrated).
H. Isenstein, Käthe Kollwitz, Copenhagen, 1949, p. 63 (another cast illustrated; titled Soldaterhustruer).
G. Strauss, Käthe Kollwitz, Dresden, 1950, p. 167 (other casts illustrated, pp. 156-157).
F. Roussillon, La sculpture de Käthe Kollwitz, Ph.D. Diss, Université de Paris Sorbonne IV, 1983, pp. 123-128, no. 18.
M. Potter et al., The David and Peggy Rockefeller Collection: European Works of Art, New York, 1984, vol. I, pp. 329-330, no. 147 (illustrated).
A. Seeler, Käthe Kollwitz, Die Plastik Werkverzeichnis, Cologne, 2016, pp. 326-337, no. 35 (another cast illustrated in color, pp. 327 and 333; details of another cast illustrated in color, pp. 238, 331 and 336).