Works
* ''Helen Clay Frick: Bittersweet Heiress,'' biography (Pittsburgh: University of Pittsburgh Press, 2007) * ''The Henry Clay Frick Houses: Architecture-Interiors-Landscapes In the Golden Era,'' nonfiction (New York: Monacelli Press, 2001) * ''Henry Clay Frick: An Intimate Portrait,'' biography (New York: Abbeville Press, 1998)External links
* http://frickhistory.com/ Martha Frick Symington Sanger website 1941 births Living people 21st-century American women writers 20th-century American women writers 20th-century American non-fiction writers American biographers American women biographers 21st-century American non-fiction writers {{US-nonfiction-writer-stub