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I found this site https://memory.loc.gov/cgi-bin/ampage?collId=llhb&fileName=020/llhb020.db&recNum=51 when searching. As you can see, it goes back to the very beginning of our country. There is no way I can go back that far. The Great Depression was between 1929 and 1939. I would say that era is what brought about our country as we now know it today. If there are no objections, I will go no further than that back time period.