Jack Tworkov: Against Extremes – Five Decades of Painting at the UBS Art Gallery » Jack Tworkov, Crossfield I 1968. Oil on canvas, 80 x 70 inches. Collection of Beatrice Perry, NY.

Jack Tworkov, Crossfield I 1968. Oil on canvas, 80 x 70 inches. Collection of Beatrice Perry, NY.

Jack Tworkov, Crossfield I 1968. Oil on canvas, 80 x 70 inches. Collection of Beatrice Perry, NY.