"New York State Census, 1905," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:SPN9-H3Y : 20 July 2018), Gussie Abraham in household of Alexander Abraham, Manhattan, A.D. 28, E.D. 11, New York, New York; citing p. 50, line 17, various county clerk offices, New York; FHL microfilm 1,433,109.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M2YX-GT7 : accessed 8 March 2019), Gussie Abraham in household of Alexander Abraham, Kansas Ward 11, Jackson, Missouri, United States; citing enumeration district (ED) ED 135, sheet 9B, family 186, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 787; FHL microfilm 1,374,800.
Wife United States Census, 1930 https://familysearch.org/ark:/61903/1:1:XHFW-N5R
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K749-46R : 15 March 2018), Gussie Abrahams in household of Alex Abrahams, Ward 4, Kansas City, Kaw Township, Jackson, Missouri, United States; citing enumeration district (ED) 116-89, sheet 9B, line 53, family 220, 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 2168.
"Find A Grave Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVK7-DTTR : 11 July 2016), Gussie Lefkowitz Abraham, 1945; Burial, Kansas City, Jackson, Missouri, United States of America, Sheffield Cemetery; citing record ID 35884029, Find a Grave, http://www.findagrave.com.
Missouri Death Certificates, 1910 - 1965 http://www.sos.mo.gov/images/archives/deathcerts/1945/1945_00000935.PDF