National Speleological Society          http://caves.org

Indiana Cave Survey          https://caves.org/survey/ics/

Central Indiana Grotto          http://cig.caves.org

Greater Cincinnati Grotto          http://www.gcgcavers.com//

The Louisville Grotto          http://louisville.caves.org/

Hidden River Cave - KY          http://hiddenrivercave.com/

Cave Country Canoes on Blue River          http://www.cavecountrycanoes.com/

Indiana Karst Conservancy          http://ikc.caves.org/index.shtml

Bat Conservation International          http://www.batcon.org/

Caving in Indiana          http://www.angelfire.com/in3/caving/

Marengo Cave          http://www.marengocave.com/

Pine Mountain Grotto          http://www.caves.org/grotto/pmg/

Windy City Grotto          http://windycitygrotto.org

Great Saltpeter Cave          http://www.caves.org/conservancy/gsp/

Kentucky geological Survey          http://www.uky.edu/KGS/

Harrison - Crawford Grotto          http://www.caves.org/grotto/hcg/

St. Joseph Valley Grotto          http://www.caves.org/grotto/sjvg/

Kentucky Down Under          http://www.kdu.com/

Indiana Caver          http://indianacaver.com

Indiana Caverns          http://indianacaverns.com

Cave Trolls          http://cavetrolls.org

Bloomington Indiana Grotto          http://caves.org/grotto/big/big.html

Purdue Outing Club          http://www.purdueoutingclub.org/caving

Indiana University Caving Club          http://www.indiana.edu/~iusc/

Tom Karr - The "Lost Boy"          http://www.tomkarr.com/lostboy.html

WIG FACEBOOK PAGE          https://www.facebook.com/groups/771845549544088/