On the reverse: label with data of the work and signature of the author. Bibliography: 2004, Getulio Alviani, edited by Giacinto Di Pietrantonio, Skira Editore, n. 22; 2009, Materialbild-Material Picture. Italia 1950 - 1965, edited by P. Weibel, Silvana Editore, p. 330.
Author's authentication on photo.