Waller-Joos-Stetzler
"United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MNGP-9B1 : accessed 09 Jun 2014), Mary F Robinson in household of Frank Robinson, Loudon, Loudon, Tennessee, United States; citing sheet 8A, family 148, NARA microfilm publication T625, FHL microfilm 1821751.
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Title "United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MNGP-9B1 : accessed 09 Jun 2014), Mary F Robinson in household of Frank Robinson, Loudon, Loudon, Tennessee, United States; citing sheet 8A, family 148, NARA microfilm publication T625, FHL microfilm 1821751. Short Title Mary F Robinson in household of Frank Robinson, "United States Census, 1920" Source ID S1221 Linked to (1) Robinson, Mary Frances