Polish Painting Masterpieces
Rafal Malczewski
"Mountainous Landscape", watercolour on cardboard, 67 x 97 cm, National Museum, Warsaw

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