1975
Hamburg Griffelkunstvereinigung, 1975
Turtell, Neal, Mr., 2010
Fred Sandback, 1989
Turtell, Neal, Mr., 1985
Turtell, Neal, Mr., 1993
Fred Sandback, 1968
Fred Sandback, 1975
Turtell, Neal, Mr., 1975
Fred Sandback, 1970
Turtell, Neal, Mr., 1972
Fred Sandback, 1987
