etching and aquatint, numbered 8/6041 x 32 cm (64.5 x 50 cm, sheet size), (unframed)Signed and titled in pencil along the lower marginPrinter Grafica Romero, RomeLiteratureF. di Castro,La linea astratta dell'incisione italiana, Stamperia Romero 1960 - 1986, publisher Electa 1989 n. 455 p. 143