HANGEN, Heijo. Aufbauablauf in 6 Teilen.

(No place): Self-published, 1970.  First edition.  Quarto.  Portfolio of six prints each measuring approx. 30cm by 21cm.  This copy 038 of an unspecified number, signed by the artist on the reverse of one print.  A very good example, some bumping to bottom corner of the prints.