http://www.helium.com/knowledge/293105-plot-summary-un-ballo-in-maschera-a-masked-ball-by-giuseppe-verdi.xml Helium.com > Playwrights & Plays > Plot summary: Un Ballo in Maschera (A Masked Ball), by Giuseppe Verdi en-us Copyright Helium.com Sun, 08 Nov 2009 05:08:54 GMT Sun, 08 Nov 2009 05:08:54 GMT