Different graphic works with different sizes
Each signed
1. "Lettera liberatoria" 1974 Included in "Geiger no.6", No. PV0273
2. "Untitled" 1979 Included in "Geiger no.8", No. PV0275
3. "Il confessore elettronico" 1996 Included in "Geiger no.10", No. PV0277
