Frydman, S. Cosima Wagner, c1983 title page (Cosima Wagner) page 9 (Cosima, daughter of Franz Liszt and the comtesse Marie d'Agoult) page 4 of cover (became the wife of Richard Wagner)
Rain, H. Les enfants du génie, c1986 page 128, etc. (Cosima von Bülow; later married Richard Wagner)
Baker, 8th ed. (Wagner, Cosima; b. Dec. 24, 1837, Bellagio, on Lake Como, d. Apr. 1, 1930, Bayreuth; wife of Richard Wagner, daughter of Franz Liszt and the Countess Marie d'Agoult; married to Hans von Bülow, 1857-1870)