"New York, New York City Births, 1846-1909," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:2WDM-FGZ : accessed 11 April 2016), Mary M. Reynolds in entry for Helen Matilda Burke, 02 Oct 1906; citing Birth, Bronx, New York, New York, United States, New York Municipal Archives, New York; FHL microfilm 2,023,142.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M5ZM-PS7 : accessed 11 April 2016), Mary E Burke in household of James F Burke, Bronx Assembly District 32, New York, New York, United States; citing enumeration district (ED) ED 1438, sheet 9A, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,375,010.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJGK-XSY : accessed 11 April 2016), Helen Burke in household of James Burke, Bronx Assembly District 1, Bronx, New York, United States; citing sheet 1B, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,821,129.