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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:1619449
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geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:1626043
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en.wikipedia.org/wiki/Caspian,_Michigan (22 Jun 2010)
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www.caspiancity.org/index.htm (5 Sep 2010)
Caspian - A special place for our people. We are located in the Upper Peninsula of Michigan in beautiful and historic Iron County.
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www.caspiancity.org/history.htm (10 Sep 2008)