000128844 1887-1968 1912-1992 1925-2008 1930- 1939-1945 20thcentury american art arts biography cage cunningham duchamp edelman exhibitions experimentalmethods frederick friendsandassociatesduchamp greatbritain hammersley historians history holocaust jasper jewish(1939-1945) john johns kennedy ludovic marcel marek merce personalnarratives poland rauschenberg robert televisionpersonalities undergroundmovements warsaw worldwar