"A Walking Killer Called Mary"Archived 2010-12-18 at the Wayback Machine, by Mark Surfrin, Chicago Tribune Magazine, April 8, 1979, pp56–63; "'Typhoid Mary' Freed: Lederle Thinks She's Learned to Keep Her Germs to Herself", New York Times, February 21, 1910, p18
James B. Roberts and Alexander G. Skutt, The Boxing Register: International Boxing Hall of Fame Official Record Book (4th Ed., McBooks Press, 2006), p250; "Ad Wolgast Whips Battling Nelson", New York Times, February 23, 1910, p10
"A Walking Killer Called Mary"Archived 2010-12-18 at the Wayback Machine, by Mark Surfrin, Chicago Tribune Magazine, April 8, 1979, pp56–63; "'Typhoid Mary' Freed: Lederle Thinks She's Learned to Keep Her Germs to Herself", New York Times, February 21, 1910, p18