[B162] Huishouden Frank T. Werthman 1900, in: United States Federal Census 1900, Oneida County (New York), population schedule, Utica City (Ward 7), Enumeration District 61, pagina 4B, family 98 (regels 68-69, [Frank] Warthmen); FamilySearch (Salt Lake City, Utah, USA), "United States Census, 1900", online database met afbeeldingen,
https://www.familysearch.org/ark:/61903/1:1:MS2V-287 (geraadpleegd 26-12-2021).