History of caving in Missouri is a short article by Jo Schaper.
The Speleozarks Cave Factory by Jo Schaper.
GeoSTRAT is a free Google Earth plug in made available by the Missouri Department of Natural Resources. It is a great tool to explore spatial relationships in Missouri karst and other aspects of geologic interest.
A Guide to Missouri Cave Life is a publication put out by the Missouri Department of Conservation and is a useful tool to identify some of the more common Missouri cave life.
Caring for Your Karst is a great resource for landowners and anyone looking to understand how karst works, particularly in the Ozarks.
Missourisprings.com - a beginner's guide to the springs of Missouri by Jo Schaper
Webster's Home Cave - a beginner's guide to speleology by Jo Schaper