Own technique/paper, 12x8.7 cm, signed and dated. middle: W.Borowski 63
work made for the portfolio "Confrontations" 1963 published by the "Krzywe Koło" gallery, issued in an edition of only 250 pieces and containing works of the most interesting artists cooperating with the gallery.
Cf. Janusz Zagrodzki, Krzywe Koło Gallery (1956-1965) Works on paper - exhibition catalog; Radom 2015, p.186, item 10.
