Belting, Hans.  The Germans and Their Art:  A Troublesome Relationship.  New Haven:  Yale University Press, 1998.  709.43 B453d

Gillen, Eckhart, Ed.  German Art from Beckmann to Richter:  Images of a Divided Country.  Cologne:  DuMont Buchverlag, 1997.  709.22 G373

Joachimides, Christos M., et al.  German Art in the 20th Century.  Munich:  Prestel Verlag, 1985.  709.43  G373