Anmerkungen:
Catalog of an itinerant exhibition held at the HackelBury Fine Art, London, England, Sept. 21-Dec. 20, 2012, and at the Howard Greenberg Gallery, New York, United States, Mar. 1-Apr. 12, 2013. - On t.p.: Hackel Bury Gallery; HGG, Howard Greenberg Gallery. - W. Klein 1928-