US Federal Census; US Federal Census; Year: 1930; Census Place: Antelope, Los Angeles, California; Roll: 123; Page: 10A; Enumeration District: 0799; Image: 341.0; FHL microfilm: 2339858. (Ancestry.com link)
"California, County Marriages, 1850-1952," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K8V2-LR8 : 8 December 2017), Jack Wylie Cathcart and Sue Garland, 14 Sep 1941; citing Los Angeles, California, United States, county courthouses, California; FHL microfilm 2,114,601.
"United States Census, 1940," database with images, FamilySearch ( : 27 July 2019), Sue Garland in household of Ethel Garland, Councilmanic District 3, Los Angeles, Los Angeles Township, Los Angeles, California, United States; citing enumeration district (ED) 60-219, sheet 5B, line 67, family 91, 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 407. 
Nevada Department of Health; Carson City, Nevada; Nevada Death Records --- Ancestry.com. Nevada, Death Certificates, 1911-1965 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2016.
Find A Grave, database and images (https://www.findagrave.com : accessed 04 August 2019), memorial page for Suzanne Gumm Cathcart (24 Sep 1915–27 May 1964), Find A Grave Memorial no. 126982696, citing Forest Lawn Memorial Park (Glendale), Glendale, Los Angeles County, California, USA ; Maintained by Romper90069 (contributor 1277) .