Possible possessor / holder: Blok, J.A. [nl] Location: Amsterdam [nl] Archival source: Archief SNK nr. 659
Possible possessor / holder: Denijs, J. [nl] Role: art dealers Location: Amsterdam [nl] Archival source: Archief SNK nr. 659
Possible possessor / holder: Baum, W. [nl] Location: Dortmund [nl] Archival source: Archief SNK nr. 659
