[B189] Overlijden John R. Williams (index), in: New York State, Department of Health (Albany, New York, USA), "Genealogical Research Death Index: Beginning 1957", dataset, State File Number 58174; FamilySearch (Salt Lake City, Utah, USA), "New York State Health Department, Genealogical Research Death Index, 1957-1963", online database,
https://familysearch.org/ark:/61903/1:1:2CHG-F34 (geraadpleegd 09-02-2022).