- ·Cactus, study
- ·1975
- ·43 cm
- ·Ink, paper
- ·00.163.13.
- ·Cactus, study
- ·1975
- ·43 cm
- ·Ink, paper
- ·00.163.15.
- ·Cactus, study
- ·1975
- ·42 cm
- ·Ink, paper
- ·00.280.7.
- ·Cactus, study
- ·1975
- ·42 cm
- ·Ink, paper
- ·00.280.8.
- ·Cactus, study
- ·1975
- ·40 cm
- ·Ink, paper
- ·00.5.1.
- ·Cactus, study
- ·1975
- ·43 cm
- ·Ink, paper
- ·00.163.8.