1970s 1980s 1960s 1990s CURRENT 2010s 2000s View fullsize 23º N Watercolor on Paper, 27.5 x 39.2 in, 1978 View fullsize Study for ‘Monument’ Graphite on paper, 20.5 x 16.6 in, 1976 View fullsize Study for ‘Crossfire’ Pastel on Paper, 26 x 20 in, 1973