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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:643602
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en.wikipedia.org/wiki/Fergus_Falls,_Minnesota (24 Aug 2010)
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www.co.otter-tail.mn.us/cities/fergusfalls.php (3 Aug 2012)
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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:2394758