- ·Constructive study
- ·1974
- ·30 cm
- ·Pen, paper
- ·00.256.1.
- ·Constructive study
- ·1974
- ·24 cm
- ·Ink, watercolour, paper
- ·00.166.1.
- ·Constructive sketches
- ·1974
- ·21 cm
- ·Ink, paper
- ·00.256.3.
- ·Constructive sketches
- ·1974
- ·22 cm
- ·Ink, paper
- ·00.165.2.
- ·Constructive sketches
- ·1974
- ·30 cm
- ·Ink, paper
- ·00.256.2.
- ·Constructive sketch
- ·1974
- ·51 cm
- ·Ink, paper
- ·00.166.3.