-
geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:406024
-
en.wikipedia.org/wiki/Cherry_Valley,_Illinois (27 Jun 2010)
-
geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:2397612
-
idaillinois.org/cdm/landingpage/collection/cvpl (23 Feb 2013)