"New York, New York City Births, 1846-1909," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:2WDQ-6DC : 11 February 2018), Richard Hafran, 23 May 1898; citing Manhattan, New York, New York, United States, reference cn 1448 New York Municipal Archives, New York; FHL microfilm 2,022,836.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MS2H-23Q : accessed 29 August 2021), Richard Heffron in household of Richard E Heffron, Borough of the Bronx, Election District 14 New York City Ward 35, New York County, New York, United States; citing enumeration district (ED) 1012, sheet 22B, family 559, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,126.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M5WN-RXB : accessed 29 August 2021), Richard H Heffron in household of Richard E Heffron, Bronx Assembly District 33, New York, New York, United States; citing enumeration district (ED) ED 1516, sheet 7A, family 152, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1000; FHL microfilm 1,375,013.
"United States World War I Draft Registration Cards, 1917-1918", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K6JX-8CM : 23 February 2021), Richard Herman Heffron, 1917-1918.
"New York State Census, 1925," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:KS41-QVV : 8 November 2014), Richard H Heffron, Hempstead, A.D. 01, E.D. 52, Nassau, New York, United States; records extracted by Ancestry and images digitized by FamilySearch; citing p. 17, line 23, New York State Archives, Albany.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X78G-B5Y : accessed 29 August 2021), Richard Heffron in household of John Wilson, Valley, Nassau, New York, United States; citing enumeration district (ED) ED 80, sheet 15A, line 23, family 440, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1458; FHL microfilm 2,341,193.
"New York, New York Passenger and Crew Lists, 1909, 1925-1957," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:24NQ-CWQ : 2 March 2021), Richard Heffron, 1931; citing Immigration, New York, New York, United States, NARA microfilm publication T715 (Washington, D.C.: National Archives and Records Administration, n.d.).
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KQY9-MX5 : 13 February 2020), Richard H Heffran in household of Richard E Heffran, Valley Stream, Hempstead Town, Nassau, New York, United States; citing enumeration district (ED) 30-125, sheet 7A, line 19, family 136, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 2687.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JR35-6ML : 7 January 2021), Richard Heffron, Mar 1977; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).