

1920 US Census: https://www.familysearch.org/ark:/61903/1:1:MNMY-5QN
Joseph Petokas United States Census, 1920 + first wife Margaret - https://www.familysearch.org/ark:/61903/1:1:MNMY-5Q8
Joseph Petokas United States Census, 1930 + second wife Helen - https://www.familysearch.org/ark:/61903/1:1:XHHC-LP7
Joseph Petokas United States Census, 1940 + Helen - https://www.familysearch.org/ark:/61903/1:1:KQN6-F32
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