Ancestry.com. California Birth Index, 1905-1995 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2005. Birthdate: 9 Aug 1908; Birth County: San Mateo.
Ancestry.com. California, U.S., Death Index, 1940-1997 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2000. Place: San Mateo; Date: 2 Oct 1986; Social Security: XXXXXX124.
Find a Grave, database and images (https://www.findagrave.com/memorial/85676442/raymond-william-hansen: accessed ), memorial page for Raymond William Hansen (9 Aug 1908–2 Oct 1986), Find a Grave Memorial ID 85676442, citing Saint John's Cemetery, San Mateo, San Mateo County, California, USA; Maintained by: Find a Grave.
Ancestry.com. U.S., World War II Draft Cards Young Men, 1940-1947 [database on-line]. Lehi, UT, USA: Ancestry.com Operations, Inc., 2011. National Archives at St. Louis; St. Louis, Missouri; WWII Draft Registration Cards for California, 10/16/1940-03/31/1947; Record Group: Records of the Selective Service System, 147; Box: 746