Keywords: Delboeuf 1891.JPG en Portrait of Belgian Mathematician Joseph Delboeuf fr Portrait du mathématicien belge Joseph Delboeuf Archives Départementales de Meurthe et Moselle M Barras 1891 PD-old DEFAULTSORT Delboeuf Joseph Psychologists from Belgium Mathematicians from Belgium Philosophers from Belgium Hypnosis People of Liège 1831 births 1896 deaths |