Polish Painting Masterpieces
Rafal Malczewski
"Portrait of Stanislaw Ignacy Witkiewicz", oil on cardboard on hard fiber board, 97 x 59 cm, Museum of Central Pomerania, Slupsk

Source: Czapska-Michalik, Magdalena, „Rafal Malczewski [1892-1965]”, „LUDZIE CZASY DZIELA” series, Edipresse Polska S.A., Warszawa 2007, ISBN 978-83-7477-211-2