Peter Roehr, Untitled (FO-97) 1965 Signed on the reverse on a label in blue ballpoint pen: Peter Roehr. Beside this to the left another label with the estate stamp inscribed in blue ballpoint pen with the number: FO-97 43 × 43 cm Collage of paper, laminated by the artist Private Collection, Hesse Peter Roehr – Werke aus Frankfurter Sammlungen. Frankfurt am Main, Museum für Moderne Kunst/Städel Museum, 2009/10 / Peter Roehr. 37 Works. Berlin, Grisebach, 2016, ill. p. 30