Clemen, Paul, 1866-1947, Art Institute of Chicago, Metropolitan Museum of Art (New York, N.Y.), Copley Society (Boston, Mass.) · [Chicago] : Chicago Art Institute ; Berlin : G. Stilke · leaf 101
Br permission or K. Hriifkinann A.G., Munich. Arnold Boecklin Surging: Sea
Art, German · Artists
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.