Wallraf-Richartz-Museum.
Shan-hsueh Jen
Rafael Cardona
Ostap Vyshni͡a︡
Gemeentelijke Archiefdienst Amsterdam.
Cecilia G. de Guilarte
Robert MacGilbrae Collett
Ewa Przłubska
K. A. Citroen
D. Amati
Reinhard Lullies
Franz E. Aschinger
José Gómez Zuloaga
John B. Coyle
Georg Galster
Texas Technological College. Southwest Collection.