Dieter Roth, Insel, 1968 (c) Dieter Roth Estate – photo N. Leray

Dieter Roth, Insel, 1968 © Dieter Roth Estate - photo N. Leray

Dieter Roth, Insel, 1968 © Dieter Roth Estate - photo N. Leray

Dieter Roth, Insel, 1968 © Dieter Roth Estate – photo N. Leray