1920 United States Federal Census, Database online. Year: 1920; Census Place: St Paul Ward 1, Ramsey, Minnesota; Roll: T625_852; Page: 23B; Enumeration District: 15; Image: 389.Record for Walter E Otto
1930 United States Federal Census, Database online. Year: 1930; Census Place: St Paul, Ramsey, Minnesota; Roll: 1114; Page: 12A; Enumeration District: 12; Image: 1097.0.Record for Walter E Otto