File:Max Pechstein, 1911, Under the Trees (Akte im Freien), oil on canvas, 73.6 x 99 cm (29 x 39 in), Detroit Institute of Arts.jpg

Published in 1920
Reproduced in Cézanne und Hodler Einführung in die Probleme der Malerei der Gegenwart, 4. Aufl. von Fritz Burger, Published 1920 by Delphin-verlag, München: Openlibrary.org

Licensing
This image can have no independent copyright as it is simply a faithful reproduction of an old, public domain, two-dimensional work of art published outside the U.S. before 1923.