Pap., 15 x 17 cm, unpaginated, illustrations in bl/w. Introduction by H. Stünke, followed by section 'Herstellung einer Radierung', with 7 bl/w photographs of Heyboer at work. Describes 62 prints from 1958-1960, all illustrated.

Extremely rare.

- From the collection of artist Martin Tissing (1936-2018), with his name and annotation on the French title