Catalogue de tableaux modernes par Bakker, Korff, Boulenger, Claus, Constable ... provenant de la collection de feu M. Alphonse Willems, de Bruxelles ... (1920)
Galerie Georges Petit, creator · [Paris] : [publisher not identified] · leaf 73
2 . C) [e, APT { Phtoe }
Willems, Alphonse, 1839-1912 -- Art collections · Art -- Private collections
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.