| Sources  | 
- [S4]  1910 United States Federal Census, Ancestry.com, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2006;), Database online. Year: 1910; Census Place: Billings Ward 3, Yellowstone, Montana; Roll: T624_837; Page: 2A; Enumeration District: 249; Image: 745.
 
Record for Mathur Kupilik 
 
  
- [S16]  1920 United States Federal Census, Ancestry.com, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2010;), Database online. Year: 1920; Census Place: Missoula, Missoula, Montana; Roll: T625_973; Page: 6B; Enumeration District: 152; Image: .
 
Record for Fred Kupilik 
 
  
- [S2640]  Montana Death Index, 1907-2007, Montana State Genealogical Society and Ancestry.com, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2009;), Database online.
 
Record for Fred Kupilick 
  
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