Allgemeines Kunstler-Lexicon (German Edition): M. Ller, Hermann Alexander, Singer, Hans Wolfgang, Muller, Hermann Alexander: 9781175405913: Amazon.com: Books
Allgemeines Künstler-Lexicon; Band 1 c.1 (German Edition): Müller, Hermann Alexander 1814-1894, Singer, Hans Wolfgang b. 1867: 9781360180069: Amazon.com: Books
Precedents of the Unprecedented: Black Squares Before Malevich – The Public Domain Review