↑ Grover, Dorys Crow (2004). Some Western Paintings of WHD Koerner. Journal of American Culture, Volume 14, Issue 2, pages 13–18, Summer 1991.
↑ Munden, Kenneth White (Ed.) The American Film Institute catalog of motion pictures produced in the United States, Part 1: Feature films, 1921 - 1930. University of California Press, ISBN978-0-520-20969-5
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