77/4799 Wijnberg, N. (1918-2006). "De proef op de som." Etching, 25,8x19 cm., signed, "'78" and "Prova 4" in pencil, titled in the plate. - AND 2 col. lithographs by the same, both signed, i.a. "Dooie Visiesvreters, dat zijn 't!"