Deirdre Mary Grusovin AM (born 1 September 1938) was a Labor member of the New South Wales Parliament for over twenty five years.
In 1990, she contested a by-election in Heffron, winning the seat in the New South Wales Legislative Assembly which had been vacated by her brother, who transferred to Federal Parliament.
Labor leader Bob Carr had urged her not to do so, but Grusovin proceeded to read part of the document to parliament without further notice.
Premier John Fahey called on Labor leader Bob Carr to sack her from the shadow ministry if she would not produce supporting evidence and the NSW Law Society labelled her actions "a gross abuse of parliamentary privilege".
Marsden challenged Grusovin to repeat the comments outside parliament, and would later successfully sue a media outlet for defamation over the allegations.