membranes
Membranes   (1964 – 1967) >		space-holds
Space-holds   (1973 – 1977) >		space-screens
Space-screens   (1977 – 1979) >		historical-memory-works
Historical Memory Works   (1979 – 1986) >
shadow-as-volume-shadow-still-lifes
Shadow As Volume / Shadow Still Lifes   (1986 – 1997) >		narrative-heads-shadow-portraits
Narrative Heads / Shadow Portraits   (1998 – 2003) >		orange-meditations
Orange Meditations   (2004 to the present) >		large-scale-sited-works
Large-Scale Sited Works   (1967 to the present) >