Rosa Keck, a Gypsy of German nationality, gave birth to her first two children in Germany, Rudolf, in Deutz, near Cologne, in 1932, and Sophia, in Kreuznach, also near Cologne, in 1935.
ADRIAENS Ward, STEINBERG Maxime (et al.), Mecheln-Auschwitz, 1942-1944. The destruction of Jews and gypsies from Belgium, 4 volumes, Brussels, 2009