Modern european sculpture : 1918-1945. Unknown beings and other realities. [anlässl. d. Ausst. ..., Albright-Knox Art Gallery, Buffalo, New York, May 12 - June 24, 1979 ; The Minneapolis Institute of Arts, Minneapolis, Minnesota, July 22 - September 2, 1979 ; San Francisco Museum of Modern Art, San Francisco, California, October 5 - November 18, 1979]