"White surface" , 1969, dry impression ex. VII / XXXIII, signed in pencil on the lower right and numbered on the lower left, dry stamp publisher il Nuovo Torcoliere, Roma at the lower right, framed.
Literature: Enrico Castellani opera grafica 1960-1995, Corraini Editore, Mantova 1995, immagine n. 11, 45x60 cm.