Minnesota
- Blue Earth County Historical Society
- GLO Historic Map Plat Retrieval System
- Immigration History Research Center
- Jewish Historical Society of the Upper Midwest
- John R Borchert Map Library: Digitized Plat Maps and Atlases
- Minnesota Discovery Center
- Minnesota Genealogical Society
- Minnesota Historical Society
- Minnesota Official Marriage System
- Minnesota Population Center
- Rochester Digital Library: Directories
- The History People: St Louis County and Northeastern Minnesota
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