-
geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:1583387
-
geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:1566387
-
en.wikipedia.org/wiki/Highland,_Iowa_County,_Wisconsin (17 Jul 2010)
-
en.wikipedia.org/wiki/Highland,_Wisconsin (26 Jun 2010)