7 volumes in all. Square portfolios with many original graphics from artists of the period. The first 4 volumes,1-4, have 20 or more artists per volume and the last 3 , 13-15, are one artist only. Rot made graphics Nummern-Malwerk on pink paper for Volume 3, Bildmaterial fur et Nr.2 for Volume 2, and for volume 15 made an artist book titled SNOW with 96 reproductions of photographs and hand written translations by the author from 'snow'(unique book now in MOMA collection) Introduction by Daniel Spoerri. DR. CW. 20 n. 33. 23x23cm.. [ 1111].