↑ "United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VBVB-ZYV : accessed 22 August 2016), Joseph Jacobson in household of Sam Jacobson, Ward 3, Muskogee, Porter Township, Muskogee, Oklahoma, United States; citing enumeration district (ED) 51-42A, sheet 8B, family 177, 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 3314.
↑ "United States World War II Army Enlistment Records, 1938-1946," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KMX9-42Z : accessed 28 February 2015), Joseph M Jacobson, enlisted 09 Dec 1942, Tulsa, Oklahoma, United States; citing "Electronic Army Serial Number Merged File, ca. 1938-1946," database, The National Archives: Access to Archival Databases (AAD) (http://aad.archives.gov : National Archives and Records Administration, 2002); NARA NAID 126323, National Archives and Records Administration, Washington, D.C.
↑ "United States Social Security Death Index," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/J5S9-9JF : accessed 28 February 2015), Joseph M Jacobson, 29 Apr 2003; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
See also:
"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XCWF-3C4 : accessed 28 February 2015), Joseph Jacobson in household of Samuel D Jacobson, Muskogee, Muskogee, Oklahoma, United States; citing enumeration district (ED) 0039, sheet 17A, family 419, line 45, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1916; FHL microfilm 2,341,650.
"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/VBVB-ZYV : accessed 28 February 2015), Joseph Jacobson in household of Sam Jacobson, Ward 3, Muskogee, Porter Township, Muskogee, Oklahoma, United States; citing enumeration district (ED) 51-42A, sheet 8B, family 177, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 3314.