Which area of Poland produced the largest number of immigrants to the USA in the early 1900’s?

Filed Under (Genealogy) by admin on 05-01-2008

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poland
Jumpin’ Jack Flash asked:

I realise the map of Poland is completely different today than what it was in 1912, but which areas of what was at that time Poland, had the heaviest levels of emmigration to America. And what was the peak year for immigration of Poles to the USA?

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