Polish Painting Masterpieces
Jozef Pankiewicz
"Portrait of a Boy", 1921, oil on canvas, 65 x 55 cm, National Museum, Warsaw

Source: Bernat, Anna, „Jozef Pankiewicz [1866-1940]”, „LUDZIE CZASY DZIELA” series, Edipresse Polska S.A., Warszawa 2006, ISBN 83-7477-064-3